<_Note>Nodes prefixed with a _ are not valid SPASE, but are included for debugging. Values prefixed with a x_ are not valid SPASE but may considered for addition for completeness. 2.6.1 <_MasterURL>https://cdaweb.gsfc.nasa.gov/pub/software/cdawlib/0JSONS/po_vis_visible-imager-calibrated_00000000_v01.json (from all.xml) spase://NASA/NumericalData/POLAR/VIS/VisibleImagerCalibrated/PT24S <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json Polar Visible Imaging System (VIS) Low Res. Camera <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description po_vis_visible-imager-calibrated <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source Instrument functional description:The VIS is a set of three low-light-level cameras. Two of these cameras share primary and some secondary optics and are designed to provide images of the nighttime auroral oval at visible wavelengths. A third camera is used to monitor the directions of the fields-of-view of the auroral cameras with respect to the sunlit Earth and return global images of the auroral oval at ultraviolet wavelengths. The VIS instrumentation produces an auroral image of 256 x 256 pixels approximately every 24 seconds dependent on the integration time and filter selected.The fields-of-view of the two nighttime auroral cameras are 5.6 x 6.3 degrees and 2.8 x 3.3 degrees for the low and medium resolution cameras, respectively. The medium resolution camera was never activated. One or more Earth camera images of 256 x 256 pixels are produced every five minutes, depending on the commanded mode. The field-of-view of the Earth camera is approximately 20 x 20 degrees. Reference: Frank, L. A., J. B. Sigwarth, J. D. Craven, J. P. Cravens, J. S. Dolan, M. R. Dvorsky, J. D. Harvey, P. K. Hardebeck, and D. Muller, 'The Visible Imaging System (VIS) for the Polar Spacecraft', Space Science Review, vol. 71, pp. 297-328, 1995. http://vis.physics.uiowa.edu/vis/vis_description/vis_description.htmlx [Note to first-time users: The first six variables are of primary interest. The displayable 256 x 256 raw image data is in variable 3. The displayable 256 x 256 processed image datais in variable 4. The correct orientation of a displayed image is explained in the description of variable 3 below.] Data set description:The VIS imaging data set comprises all Earth camera and Low Resolution camera images for the selected time period. The raw displayable image counts are in variable 3 while the processed displayable image counts are in variable 4. Full coordinate information is included for viewer orientation. In addition, a rotation matrix and a table of distortion-correcting look direction unit vectors are provided for the purpose of calculating coordinates for every pixel. See the description of variables 20 and 21 below. To facilitate viewing of the images, a mapping of pixel value to a recommended color table based on the characteristics of the selected filter will be included with each image. See the description of variables 25, 26, and 27 below. A relative intensity scale is provided by the uncompressed count table of variable 30. Approximate intensity levels in kiloRayleighs are given in the intensity table of variable 31.For detailed information on intensities, see Sensitivities_and_Intensities.txt http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/SENSITIVITIES_AND_INTENSITIES.TXT Variable descriptions: 1,2. Center timeThe time assigned to an image is the center time of the integration period within a resolution of 50 milliseconds. 3. Raw (unprocessed) image countsImage pixel counts range from 0 to 255. They are stored in a two-dimensional 256 x 256 byte array. Images from the Earth camera (sensor 0) are conventionally displayed with row 1 at the top, row 256 at the bottom,column 1 on the left, and column 256 on the right. The conventional image display for the low resolution camera (sensor 1) is rotated 180 degrees so that the row 1-column 1 pixel is at the lower right corner and the row 256-column 256 pixel is at the upper left corner. When displayed in this manner, the spacecraft spin axis is oriented to the right in the display, the X component is defined as the center of the image look direction, and the Y component is the cross product of the spin axis and the look direction. 4. Cleaned image countsThese are image pixel counts that have been calibrated using the following routines. For the earth camera: Horizontal Smooth EC 4 if Modified Julian Date (MJD) > 3429 (correction required after an event in 2005)Horizontal Smooth EC 6 if MJD > 4307 (correction required after an event in 2007)Subtract Cosmic RaysSubtract Slopes (adjusts for biases across the CCD)Remove Weave (corrects for interference from low resolution camera)Flat Field (corrects for other characteristics of the CCD) [Note: depending on viewing geometry, not all irregularities can be fixed completely; in particular, a wide diagonal stripe may still be visible]Dayglow SubtractNightglow Minimum For the low resolution camera: Subtract Cosmic RaysSubtract SlopesFlat FieldSmooth Filter The data structure is the same as the Raw image counts. See the description of variable 3 for details. 5. Cleaned image data in kiloRayleighs.Same data as in variable 4, only in kiloRayleighs. 6. Sensor number0 = Earth camera1 = low resolution camera2 = medium resolution camera (never activated). 7. Half integration timeThis is half the length of the integration period for the image, measured in milliseconds. 8. Filter Twelve filters are available for visible imaging; the filter number, 1-12, is given here. Ultra-violet imaging is done with one filter only, designated here as filter number 0. In addition, the peak wavelength in Angstroms is given for the selected filter.For detailed information on filter characteristics, see Sensitivities_and_Intensities.txt http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/SENSITIVITIES_AND_INTENSITIES.TXT 9. Presumed altitude of emissionsThe presumed altitude of the emissions seen in the image varies with the characteristics of the filter used. 10. Field stop positionThe field stop may partially occlude the field of view of the low or medium resolution cameras. The position is given in 1.5 degree steps. 11. Platform pitch angleThis is the platform pointing angle of rotation around the spin axis, measured from nadir. 12,13. Mirror elevation and azimuth anglesFor the low or medium resolution camera, the two-axis mirror position is given in steps measured from the instrument calibration switches.The low resolution boresight is located at step 68 in azimuth and step 118 in elevation. 14,15. Geographic coordinatesGeographic north latitude and east longitude are provided for all pixels. 16,17. Right Ascension and Declination of each pixel These values are given in degrees. 18. Altitude along tangent to line-of-sight for each pixel. 19. Flag to indicate if each pixel is pointed at the earth.(0/False 1/True) 20,21. Spacecraft position and velocity vectors, GCIThe spacecraft position vector and velocity vector in GCI coordinates are for the image center time as given in variables 1 and 2. 22. Spacecraft spin axis unit vector, GCI 23,24. Image-to-GCI rotation matrix and look direction vector tableThe rotation matrix may be used with the look direction vector table to obtain pointing vectors in GCI coordinates for each pixel. The resulting vectors may be used to calculate coordinates for the observed positions of the pixels.The general method used is described below in Coordinate_Calculation.txt http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/Coordinate_Calculation.txt 25. Zenith angle of center line-of-sight at presumed altitude This is the angle between the geocentric vector through the observed point, assuming the altitude given as variable 8, and the reverse of the image center line-of-sight vector. 26. Sun position unit vector, GCI 27. Solar zenith angle at observed point of center line-of-sight.This is the angle of the sun from zenith at the observed point of the center line-of-sight, assuming the altitude given as variable 8. 28. RGB color tableThis is the recommended color table to be used with the limits given in variables 26 and 27. 29,30. Low and high color mapping limitsThe low and high color limits are recommended for remapping the color table entries, as follows:For pixel values less than the low limit, use the color at table position 1.For pixel values greater than or equal to the low limit and less than or equal to the high limit, use the color at table position (pix-low)/(high-low) x 255 + 1.For pixel values greater than the high limit, use the color at table position 256. 31. Data quality flag The data quality word has bits set to 1 when the listed conditions are true. Bit #31 is the most significant bit in the word, and it will not be used as a flag. These are the bit assignments:bit 0 - image data frame sync errorbit 1 - image data frame counters errorbit 2 - image data fill frame flag. 32. Post gap flagThe post gap flag has these possible values: 0 - no gap occurred immediately prior to this record.1 - the gap occurred because the instrument wasnot in a mode that allowed for the production of images for the selected sensor2 - the gap occurred because level zero data were missing3 - the gap occurred because level zero data were too noisy to extract images. 33. Expanded count tableThe image pixel counts are quasi-logarithmically compressed to the range 0-255. This table gives the average of the uncompressed range for each compressed count value. Table entries 1-256 correspond to compressed counts 0-255 respectively. 34. Intensity tableApproximate intensity levels in kiloRayleighs are given for each compressed count value. Table entries 1-256 correspond to compressed counts 0-255 respectively. Intensity calculation is described in Sensitivities_and_Intensities.txt. http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/SENSITIVITIES_AND_INTENSITIES.TXT Supporting software:Supporting software is available at http://vis.physics.uiowa.edu/vis/software/ Included is an IDL program that displays the images with the recommended color bar, provides approximate intensities and coordinate data for each pixel, and and includes multiple options for image manipulation. <_Description>Source: Master/CDFglobalAttributes/TEXT <_Rights> SPDX Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html https://spdx.org/licenses/ http://space.physics.uiowa.edu/vis/ VIS instrument in University of Iowa Homepage <_Note>URL also in all.xml. Using master. http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/SENSITIVITIES_AND_INTENSITIES.TXT Instrument Sensitivity and Method of Calculating Intensities. Sensitivity and Intensity Calculation <_Note>URL also in all.xml. Using master. http://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/Coordinate_Calculation.txt Method used by Polar VIS to calculate coordinates Polar VIS Coordinate Calculation <_Note>URL also in all.xml. Using master. Instrument Sensitivity and Method of Calculating Intensities https://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/SENSITIVITIES_AND_INTENSITIES.TXT Sensitivity and Intensity Calculation <_Note>Source: InformationURL.json Method used by Polar VIS to calculate Coordinates https://cdaweb.gsfc.nasa.gov/Polar_VIS_docs/Coordinate_Calculation.txt Polar VIS Coordinate Calculation <_Note>Source: InformationURL.json Scientific Description of the VIS Instrument http://vis.physics.uiowa.edu/vis/vis_description/vis_description.htmlx Scientific Description of the VIS Instrument <_Note>Source: InformationURL.json Link to Scientific Analysis Software http://vis.physics.uiowa.edu/vis/software/ Scientific Analysis Software <_Note>Source: InformationURL.json ISTP Polar VIS low resolution camera images https://doi.org/10.48322/1mkd-p917 <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 1996-11-12T22:41:50Z 2008-04-16T06:27:07Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT24.25S <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/polar/vis/vis_visible-imager-calibrated/1996/po_vis_visible-imager-calibrated_1996111222_v01.cdf. The most common cadence, 24250 [ms] = PT24.25S, occurred for 20.0000% of the 1 timesteps. <_ObservedRegion>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ObservedRegion.json <_ProcessingLevel>Processing level is not available in the master file; it should be there instead of, say, https://github.com/rweigel/cdawmeta-spase/blob/main/ProcessingLevel.json spase://SMWG/Instrument/POLAR/VIS ImageIntensity spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/polar/vis/vis_visible-imager-calibrated In CDF via HTTP from CDAWeb po_vis_visible-imager-calibrated_%Y%m%d%H_%Q.cdf %Y PO_VIS_VISIBLE-IMAGER-CALIBRATED CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/polar/vis/vis_visible-imager-calibrated In CDF via HTTP from CDAWeb po_vis_visible-imager-calibrated_%Y%m%d%H_%Q.cdf %Y PO_VIS_VISIBLE-IMAGER-CALIBRATED CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa CDAWeb Web Service https://cdaweb.gsfc.nasa.gov/WebServices/ Instructions for using web services to access this dataset an other other metadata and options for CDAWeb datasets. The ProductKey here corresponds to the query parameter 'dataset' in the tables at the AccessURL in a dataset-related request can be made. PO_VIS_VISIBLE-IMAGER-CALIBRATED CDF CSV GIF NetCDF PNG PS PDF XML x_Script.IDL x_Script.Python Text.ASCII x_WAV spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=PO_VIS_VISIBLE-IMAGER-CALIBRATED PO_VIS_VISIBLE-IMAGER-CALIBRATED Web service user interface for this product. CDF GIF PDF Text.ASCII x_WAV spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/PO_VIS_VISIBLE-IMAGER-CALIBRATED/clientLibraryExample/ PO_VIS_VISIBLE-IMAGER-CALIBRATED Web service that generates a Python script to access this product. x_Script.IDL x_Script.Python spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/SSCWeb. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=PO_VIS_VISIBLE-IMAGER-CALIBRATED PO_VIS_VISIBLE-IMAGER-CALIBRATED Web Service to this product. HTML spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=PO_VIS_VISIBLE-IMAGER-CALIBRATED PO_VIS_VISIBLE-IMAGER-CALIBRATED Web Service to this product using the HAPI interface. CSV JSON Binary spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=PO_VIS_VISIBLE-IMAGER-CALIBRATED&return=script PO_VIS_VISIBLE-IMAGER-CALIBRATED Web Service user interface that generates scripts in IDL, Javascript, MATLAB, Python, Autoplot, curl, wget to access this product. See https://hapi-server.org/servers/api for the API. x_Script.IDL x_Script.Javascript x_Script.MATLAB x_Script.Python x_Script.Autoplot x_Script.curl x_Script.wget spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Louis A. Frank at The University of Iowa HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=PO_VIS_VISIBLE-IMAGER-CALIBRATED&format=gallery PO_VIS_VISIBLE-IMAGER-CALIBRATED Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Polar Plasma Laboratory (from all.xml/observatory/description/@short) Visible Imaging System (from all.xml/instrument/description/@short) Space Physics (from Master/CDFglobalAttributes/Discipline) Magnetospheric Science (from Master/CDFglobalAttributes/Discipline) POLAR (from Master/CDFglobalAttributes/Source_name) Polar Plasma Laboratory (from Master/CDFglobalAttributes/Source_name) L0 (from Master/CDFglobalAttributes/Data_type) Low Resolution Images (from Master/CDFglobalAttributes/Data_type) VIS (from all.xml/instrument/@ID) Earth.NearSurface.Ionosphere Earth.Magnetosphere Earth.NearSurface.AuroralRegion Earth.NearSurface.EquatorialRegion Earth.NearSurface.Plasmasphere Earth.Magnetosphere.Polar Heliosphere.Inner Earth.NearSurface.PolarCap Earth.Magnetosphere.RadiationBelt Earth.NearSurface CENTER TIME (Epoch) Epoch CATDESC: 'Image center time, Epoch'. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.' ms Scalar Temporal CENTER TIME Time_PB5 Master CDF CATDESC: 'Image center time, PB5'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -2147483648 3 year day msec Image Pixel Counts (uncleaned) Image_Counts_Raw Master CDF CATDESC: '256 x 256 Visible Image (quasi-logarithmically compressed counts)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Tables( Image_Counts(i,j)+1, Filter(1) ). The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Counts 255 256 256 Counts (cleaned) Image_Counts_Clean Master CDF CATDESC: '256 x 256 Cleaned and Filtered Visible Image (quasi-logarithmically compressed counts)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Tables( Image_Counts(i,j)+1, Filter(1) ). The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Counts 255 256 256 Geographic Grid Overlay Mapped_ImageO Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) With geographic map overlay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 Geographic Polar Projection Mapped_ImageP Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Azimuthal projection to geographic (fixed sun orientation)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 MLT-Invariant Lat Projection Mapped_ImageM Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Azimuthal projection to magnetic LT and invariant lat'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 Cleaned UV Intensity Movie_Image Master CDF CATDESC: 'Movie display of cleaned UV images in QLC counts'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Cleaned UV Intensity in QLC Counts 255 256 256 Geographic Grid Overlay Mapped_MovieO Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, with geographic grid overlay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 Geographic Polar Projection Mapped_MovieP Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, azimuthal projection to geographic (fixed sun orientation)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 MLT-Invariant Lat Projection Mapped_MovieM Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, azimuthal projection to magnetic LT and invariant lat'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' QLC Counts 255 256 256 Intensity in kRay IImage_Counts Master CDF CATDESC: 'UV Images in kRay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 Geographic Grid Overlay Mapped_ImageO_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) With geographic map overlay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 Geographic Polar Projection Mapped_ImageP_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Azimuthal projection to geographic (fixed sun orientation)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 MLT-Invariant Lat Projection Mapped_ImageM_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Azimuthal projection to magnetic LT and invariant lat'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 Cleaned UV Intensity Movie_Image_kRay Master CDF CATDESC: 'Movie display of cleaned UV images in kRay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Cleaned UV Intensity in kRay -1e+31 256 256 Geographic Grid Overlay Mapped_MovieO_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, with geographic grid overlay'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 Geographic Polar Projection Mapped_MovieP_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, azimuthal projection to geographic (fixed sun orientation)'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 MLT-Invariant Lat Projection Mapped_MovieM_kRay Master CDF CATDESC: ' --> (USE SHORT TIME SPANS) Movie, azimuthal projection to magnetic LT and invariant lat'. Master CDF VAR_NOTES: 'Image_Counts contains the displayable image. The counts have been quasi-logarithmically compressed by the instrument. Approximate uncompressed value for Image_Counts(i,j) is ExpandedCount(Image_Counts(i,j)+1). Approximate intensity in kR is Intens_Table(Image_Counts(i,j)+1).The appearance of the actual count value 255 is rare. When displaying an image,it works best to use the fill value as an overflow (i.e. brightest) value.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' kRay -1e+31 256 256 INTEGRATION TIME (HALF) Int_Time_Half Master CDF CATDESC: 'Half of the integration period measured in milliseconds'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Msec -1e+31 Filter number and wavelength Filter Master CDF CATDESC: '---> Filter number and peak wavelength in Angstroms)'. Master CDF VAR_NOTES: 'Filters #1-12 are visible wavelengths; filter #0 is UV for Earth camera images'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -2147483648 2 number Angstroms Presumed Altitude of Emissions AltF Master CDF CATDESC: '---> Presumed altitude of emissions, km.'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Kilometers -1e+31 Field-Stop Wheel Position Field_Stop Master CDF CATDESC: '---> Field-stop wheel position (1 step = 1.5 degrees)'. Master CDF VAR_NOTES: 'A field stop may occultsome part of a visible image'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Steps -2147483648 Platform Pitch Angle PPitch Master CDF CATDESC: '---> Platform pointing angle from nadir'. Master CDF VAR_NOTES: 'Platform angle of rotation around spin axis, measured from nadir in tenths of degrees'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees*10 -2147483648 Mirror Elevation Angle Mirr_Elv Master CDF CATDESC: '---> Mirror pointing angle, elevation'. Master CDF VAR_NOTES: 'Mirror pointing angle out of s/c X-Y plane in steps of ~.08660 degrees'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Steps -2147483648 Mirror Azimuth Angle Mirr_Azm Master CDF CATDESC: '---> Mirror pointing angle, azimuth'. Master CDF VAR_NOTES: 'Mirror pointing angle of rotation around spin axis, w/r/t platform position, in steps of ~.09375 degrees.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Steps -2147483648 Geo_Lat Geo_Lat Master CDF CATDESC: 'Geographic latitude grid'. Master CDF VAR_NOTES: 'Geographic N. latitude for pixels vals'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 256 256 Geo_Lon Geo_Lon Master CDF CATDESC: 'Geographic longitude grid'. Master CDF VAR_NOTES: 'Geographic E. longitude for pixel vals'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 256 256 Right Ascension Ra Master CDF CATDESC: 'GCI Right Ascension'. Master CDF VAR_NOTES: 'GCI Right Ascension for pixel vals'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 256 256 Declination Dec Master CDF CATDESC: 'GCI Declination'. Master CDF VAR_NOTES: 'GCI Declination for pixel vals'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 256 256 ALTLS ALTLS Master CDF CATDESC: 'Altitude at Line of Sight'. Master CDF VAR_NOTES: 'Altitude at Line of Sight for pixel vals'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Kilometers -1e+31 256 256 Spacecraft position GCI SC_Pos_GCI Master CDF CATDESC: 'GCI position vector of Polar spacecraft in kilometers.'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Kilometers -1e+31 3 Spacecraft velocity GCI SC_Vel_GCI Master CDF CATDESC: '---> GCI velocity vector of Polar spacecraft in km/sec.'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Kilometers/second -1e+31 3 Spacecraft spin axis GCI SC_SpinV_GCI Master CDF CATDESC: '---> GCI spin axis unit vector of Polar spacecraft.'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' 1 -1e+31 3 Rotation matrix Rotatn_Matrix Master CDF CATDESC: 'Image-to-GCI rotation matrix'. Master CDF VAR_NOTES: 'X component is look direction,Y component is the spin axis cross X'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' 1 -1e+31 3 3 Zenith Angle of Center Line V_Zenith Master CDF CATDESC: 'Zenith angle of center line-of-sight at intersection with Earth'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 Sun Vector GCI Sun_Vctr Master CDF CATDESC: 'GCI unit vector toward sun'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' 1 -1e+31 3 Solar Zenith at Center S_Zenith Master CDF CATDESC: 'Solar zenith angle at intersection of center line-of-sight with Earth'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Degrees -1e+31 Color Limit Low Limit_Lo Master CDF CATDESC: 'Lower limit for remapping color table to pixel range (see TEXT)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Counts -32768 Color Limit High Limit_Hi Master CDF CATDESC: 'Upper limit for remapping color table to pixel range (see TEXT)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' Counts -32768 Data Quality Flag D_Qual Master CDF CATDESC: 'Data quality flags'. Master CDF VAR_NOTES: 'MSB will not be used as a flag; see TEXT for other bit assignments'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (0=OK) -2147483648 Post Gap Flag Post_Gap Master CDF CATDESC: 'project standard value assignments'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -2147483648 Image headers Headers Master CDF CATDESC: 'Image header bytes'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' 255 64 16