<_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/messenger_mag_rtn_00000000_v01.json (from all.xml) spase://NASA/NumericalData/MESSENGER/MAG/PT0.05S <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json MESSENGER interplanetary magnetic field (1-second/high resolution) in RTN coordinates <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description messenger_mag_rtn <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source The Mercury Surface, Space Environment, Geochemistry and Ranging (MESSENGER) mission is designed to study the characteristics and environment of Mercury from orbit. Specifically, the scientific objectives of the mission are to characterize the chemical composition of Mercury's surface, the geologic history, the nature of the magnetic field, the size and state of the core, the volatile inventory at the poles, and the nature of Mercurys exosphere and magnetosphere over a nominal orbital mission of one Earth yearMESSENGER launched on 3 August 2004 at 6:15:56 UT (2:15:56 a.m. EDT) on a Delta 7925H (a Delta II Heavy launch vehicle with nine strap-on solid-rocket boosters). The spacecraft was injected into solar orbit 57 minutes later. The solar panels were then deployed and the spacecraft began sending data on its status. One year after launch, on 2 August 2005, MESSENGER flew by Earth at an altitude of 2347 km. On 12 December 2005 at 11:30 UT, MESSENGER fired its large thruster for 524 seconds, changing the spacecraft velocity by 316 m/s and putting it on course for its 24 October 2006 Venus flyby at an altitude of 2990 km. The second Venus flyby took place on 5 June 2007 at 23:08 UT (7:08 p.m. EDT) at an altitude of approximately 337 km. The first of three Mercury flybys, all at roughly 200 km altitude, occurred on 14 January 2008 at 19:04:39 UT, and the second on 6 October 2008 at 08:40:22 UT. The third will be on 29 September 2009. There are also five deep space manuevers. Data collected during the Mercury flybys will be used to help plan the scientific campaign during the orbital phase. Mercury orbit insertion will take place on 18 March 2011, requiring a delta-V of 0.867 km/s. The nominal orbit is planned to have a periapsis of 200 km at 60 degrees N latitude, an apoapsis of 15,193 km, a period of 12 hours and an inclination of 80 degrees. The periapsis will slowly rise due to solar perturbations to over 400 km at the end of 88 days (one Mercury year) at which point it will be readjusted to a 200 km, 12 hour orbit via a two burn sequence. Data will be collected from orbit for one Earth year, the nominal end of the primary mission will be in March 2012. Global stereo image coverage at 250 m/pixel resolution is expected. The mission should also yield global composition maps, a 3-D model of Mercury's magnetosphere, topographic profiles of the northern hemisphere, gravity field to degree and order 16, altitude profiles of elemental species, and a characterization of the volatiles in permanently shadowed craters at the poles.The MESSENGER spacecraft is a squat box (1.27 m x 1.42 m x 1.85 m) with a semi-cylindrical thermal shade (roughly 2.5 meters tall and 2 meters wide) for protection from the Sun and two solar panel wings extending radially about 6 meters from tip to tip. A 3.6 m magnetometer boom also extends from the craft. The total mass of the spacecraft is 1093 kg, 607.8 kg of this is propellant and helium. The structure is primarily graphite-cyanate-ester (GrCE) composite and consists of two vertical panels which support two large fuel tanks and two vertical panels which support the oxidizer tank and plumbing panel. The four vertical panels make up the center column and are bolted at their aft ends to an aluminum adapter. A single top deck panel mounts the LVA (large velocity adjust) thruster, small thrusters, helium and auxiliary fuel tanks, star trackers and battery.Main propulsion is via the 645-N, 317-s bipropellant LVA thruster, four 22-N monopropellant thrusters provide spacecraft steering during main thruster burns, and ten 4-N monopropellant thrusters are used for attitude control. There is also a reaction-wheel attitude control system. Knowledge for attitude control is provided by star tracking cameras, an inertial measurement unit, and six solar sensors. Power is provided by the solar panels, which extend beyond the sunshade and are rotatable to balance panel temperature and power generation, which provides a nominal 450 W in Mercury orbit. The panels are 70% optical solar reflectors and 30% GaAs/Ge cells. The power is stored in a common-pressure-vessel nickel-hydrogen battery, with 11 vessels and 2 cells per vessel.Communications are in X-band with downlink through two fixed phased-array antenna clusters and uplink and downlink through medium- and low-gain antennas on the forward and aft sides of the spacecraft. Passive thermal control, primarily a fixed opaque ceramic cloth sunshade, is utilized to maintain operating temperatures near the Sun. Radiators are built into the structure and the orbit is optimized to minimize infrared and visible light heating of the spacecraft from the surface of Mercury. Multilayer insulation, low conductivity couplings, and heaters are also used to maintain temperatures within operating limits.Five science instruments are mounted externally on the bottom deck of the main body: the Mercury Dual Imaging System (MDIS), Gamma-Ray and Neutron Spectrometer (GRNS), X-ray Spectrometer (XRS), Mercury Laser Altimeter (MLA), and Atmospheric and Surface Composition Spectrometer (MASCS). The Energetic Particle and Plasma Spectrometer (EPPS) is mounted on the side and top deck and the magnetometer (MAG) is at the end of the 3.6 m boom. Radio Science (RS) experiments will use the existing communications system.The Messenger MAG instrument is a miniature three-axis ring-core fluxgate magnetometer with low-noise electronics. It is mounted on a 3.6 m boom in the anti-sunward direction. The MAG has .. 1530 and ..51300 nT ranges with 20-bit internal resolution and 17-bit output resolution. The MAG probe samples magnetic field values along the X, Y, and Z axes at a rate of up to 20 samples/second (commandable and can vary). This dataset has 3-axis calibrated samples of the magnetic field in heliospheric RTN coordinates in units of nano-Tesla, Br, Bt, Bn. The spacecraft position is identified by radial distance from the Sun, latitude above the ecliptic plane, and azimuth with respect to the Earth-Sun line in the ecliptic plane. Anderson, B. J., M. H. Acuna, D. A. Lohr , J. Scheifele, A. Raval, H. Korth, and J. A. Slavin, \'The Magnetometer instrument on MESSENGER\', Space Science Reviews, 2007.[ANDREWSETAL2007] <_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/ MESSENGER Magnetometer data, PDS-PPI https://pds-ppi.igpp.ucla.edu/search/view/?f=yes&id=pds://PPI/MESS-E_V_H_SW-MAG-3-CDR-CALIBRATED-V1.0/DATA/RTN MESSENGER Magnetometer, MAG, calibrated data. This volume contains the MAG data from Earth to Mercury over the time interval 2004-08-12 to 2015-04-30, hosted by the Planetary Data System, Planetary Plasma Interactions node, PSD-PPI. en <_Note>URL also in all.xml, master. Using InformationURL.json. NSSDC Master Catalog, MESSENGER, MAG instrument https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=2004-030A-07 General information concerning the MESSENGER, Magnetometer, MAG, instrument en <_Note>Source: InformationURL.json PDS Data Descriptive page https://starbrite.jpl.nasa.gov/ds-view/pds/viewProfile.jsp?dsid=MESS-E/V/H/SW-MAG-3-CDR-CALIBRATED-V1.0 The MESSENGER Magnetometer, MAG, calibrated observations consist of time and position tagged magnetic field samples in physical units and coordinate systems collected by the MAG instrument during fly-by and orbital operations of Mercury. See information given for time intervals more likely to have data quality issues. en <_Note>Source: InformationURL.json MESSENGER Magnetometer, MAG, instrument, Space Science Reviews publication https://link.springer.com/article/10.1007/s11214-007-9246-7 Anderson, B.J., M.H. Acuna, D.A. Lohr, J. Scheifele, A. Raval, H. Korth, and J.A. Slavin, The Magnetometer instrument on MESSENGER, Space Sci. Rev., 2007, DOI: 10.1007/s11214-007-9246-7. en <_Note>Source: InformationURL.json Messenger Magnetic Field https://doi.org/10.48322/9wyq-j955 <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 2004-08-12T17:44:08Z 2015-04-30T15:08:14Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop <_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/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. Sean C. Solomon at Carnegie Institution of Washington HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/messenger/mag/rtn_cdf In CDF via HTTP from CDAWeb messenger_mag_rtn_%Y%m%d_%Q.cdf %Y MESSENGER_MAG_RTN CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. Sean C. Solomon at Carnegie Institution of Washington FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/messenger/mag/rtn_cdf In CDF via HTTP from CDAWeb messenger_mag_rtn_%Y%m%d_%Q.cdf %Y MESSENGER_MAG_RTN CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. Sean C. Solomon at Carnegie Institution of Washington 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. MESSENGER_MAG_RTN 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: Prof. Sean C. Solomon at Carnegie Institution of Washington CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=MESSENGER_MAG_RTN MESSENGER_MAG_RTN 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: Prof. Sean C. Solomon at Carnegie Institution of Washington CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/MESSENGER_MAG_RTN/clientLibraryExample/ MESSENGER_MAG_RTN 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: Prof. Sean C. Solomon at Carnegie Institution of Washington 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=MESSENGER_MAG_RTN MESSENGER_MAG_RTN 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: Prof. Sean C. Solomon at Carnegie Institution of Washington CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=MESSENGER_MAG_RTN@0 Web Service to this product using the HAPI interface. Note that HAPI dataset has a collection of parameters, each having the same time stamps. This CDAWeb dataset contains 2 HAPI-type datasets. The @0, @1, ... at the end of the ParameterKeys indicates the index of the CDAWeb dataset. (The dataset index <=> CDF file time variable pairs are @0 => Epoch, @1 => Epoch_200.) MESSENGER_MAG_RTN@0 MESSENGER_MAG_RTN@1 CSV JSON Binary spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Prof. Sean C. Solomon at Carnegie Institution of Washington CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=MESSENGER_MAG_RTN@0&return=script 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. Note that HAPI dataset has a collection of parameters, each having the same time stamps. This CDAWeb dataset contains 2 HAPI-type datasets. The @0, @1, ... at the end of the ParameterKeys indicates the index of the CDAWeb dataset. (The dataset index <=> CDF file time variable pairs are @0 => Epoch, @1 => Epoch_200.) MESSENGER_MAG_RTN@0 MESSENGER_MAG_RTN@1 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: Prof. Sean C. Solomon at Carnegie Institution of Washington HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=MESSENGER_MAG_RTN@0&format=gallery Web Service that generates plots. See https://hapi-server.org/plot/ for the API. MESSENGER_MAG_RTN@0 MESSENGER_MAG_RTN@1 PNG PDF SVG Messenger (from all.xml/observatory/description/@short) Magnetic Field instrument (from all.xml/instrument/description/@short) Space Physics (from Master/CDFglobalAttributes/Discipline) Interplanetary Studies (from Master/CDFglobalAttributes/Discipline) Solar Physics (from Master/CDFglobalAttributes/Discipline) Heliospheric Physics (from Master/CDFglobalAttributes/Discipline) MESSENGER (from Master/CDFglobalAttributes/Source_name) Messenger (from Master/CDFglobalAttributes/Source_name) RTN (from Master/CDFglobalAttributes/Data_type) Field in RTN coordinates (from Master/CDFglobalAttributes/Data_type) MAG (from all.xml/instrument/@ID) Mercury.Magnetosphere Mercury.Magnetosphere.Magnetotail Mercury.Magnetosphere.Main Mercury.Magnetosphere.Polar spase://SMWG/Instrument/MESSENGER/Ephemeris spase://SMWG/Instrument/MESSENGER/Magnetometer Ephemeris InstrumentStatus MagneticField Time Line Epoch CATDESC: 'Number of milliseconds since the 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 Mission elap time MissionElapsedTime Master CDF CATDESC: 'Mission elapsed time'. Master CDF VAR_NOTES: 'The derived value is created by the following formula: MET + 0.05 * delta_ts + (dt_sample)*(I-1) - latency. MET is the mission elapsed time for the entire science packet. delta_ts is the delta time in seconds between the MET and the first sample in the downloaded science packet. dt_sample is the time between samples in seconds and given by dt_sample = 1/sample_rate where sample_rate is the reported sample rate in samples per second. I is the incremental counter for each data sample in the science packet. I=1 is the first sample in the packet. Latency is the sample rate-dependent delay of the time stamp recording relative to the actual time of observation.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' seconds -1e+31 Radial Distance radialDistance Master CDF CATDESC: 'Radial distance of MESSENGER from the Sun'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km -1e+31 Latitude from ecliptic latitude_ecliptic Master CDF CATDESC: '----> North latitude from the ecliptic plane'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Azimuth from Earth-Sun line azimuth_ecliptic Master CDF CATDESC: '----> Azimuthal angle from Earth-Sun line in ecliptic plane, positive in the direction of Earth's motion '. Master CDF VAR_NOTES: 'Azimuthal angle of MESSENGER spacecraft in the instantaneous ecliptic plane with respect to the Earth-Sun line in units of degrees, positive in direction of the Earth's orbital motion with Z in J2000 coordinates'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Br in RTN quality B_radial_q Master CDF CATDESC: '(Good values only) B radial (Br) in RTN coordinates '. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Bt in RTN B_tangential_q Master CDF CATDESC: '----> (Good values only) B tangential (Bt)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Bn in RTN B_normal_q Master CDF CATDESC: '----> (Good values only) B normal (Bn)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Br in RTN B_radial Master CDF CATDESC: '(All qualities) B radial (Br) in RTN coordinates '. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Bt in RTN B_tangential Master CDF CATDESC: '----> (All qualities) B tangential (Bt)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Bn in RTN B_normal Master CDF CATDESC: '----> (All qualities) B normal (Bn)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Quality Flag Quality_Flag Master CDF CATDESC: '3-digit daily quality flag (222 or 223 = good = boom deployed, sensor in shadow, any heater contamination corrected)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (222/223=good) -2147483648 Data Cadence Epoch_cadence Master CDF CATDESC: 'Data Cadence'. Master CDF VAR_NOTES: 'Computed on the fly to determine the time res. between points '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' milliseconds -1e+31 Time Line for non-burst data Epoch_200 CATDESC: 'Number of milliseconds since the 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 Radial Distance radialDistance_200 Master CDF CATDESC: 'Radial distance of MESSENGER from the Sun (0.5 sec cadence)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' km (>200) -1e+31 Latitude from ecliptic latitude_ecliptic_200 Master CDF CATDESC: '----> North latitude from the ecliptic plane (0.5 sec cadence)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' deg (>200) -1e+31 Azimuth from Earth-Sun line azimuth_ecliptic_200 Master CDF CATDESC: '----> Azimuthal angle from Earth-Sun line in ecliptic plane, positive in the direction of Earth's motion (0.5 sec cadence)'. Master CDF VAR_NOTES: 'Azimuthal angle of MESSENGER spacecraft in the instantaneous ecliptic plane with respect to the Earth-Sun line in units of degrees, positive in direction of the Earth's orbital motion with Z in J2000 coordinates'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' deg (>200) -1e+31 Br in RTN quality B_radial_200 Master CDF CATDESC: '(Good values at 0.5 sec cadence only) B radial (Br) in RTN coordinates '. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' nT (>200) -1e+31 Bt in RTN B_tangential_200 Master CDF CATDESC: '----> (Good values at 0.5 sec cadence only) B tangential (Bt)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' nT (>200) -1e+31 Bn in RTN B_normal_200 Master CDF CATDESC: '----> (Good values at 0.5 sec cadence only) B normal (Bn)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_200.' nT (>200) -1e+31