2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Catalog/IMP8/MAG/Multisource NASA Catalog Multi-spacecraft bow shock crossing list https://doi.org/10.48322/j75x-q816 2026-02-02T13:10:22Z 2023-05-11T12:34:56.789 Updated to SPASE Version 2.5.0 if needed, fix broken URL, Added DOI information, JMW 2023-09-27T12:34:56.789 Updated Authors. JMW 2026-02-02T13:10:22Z Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB Lists of bow shock crossings observed by the IMP 8, Geotail, Magion-4 and Cluster/Rumba spacecraft. For each crossing, time and spacecraft location are given, plus GSE and GSM components of upstream magnetic field and solar wind velocity, upstream solar wind ion density and temperature, and multiple upstream derived parameters (sonic, Alfvenic and magnetosonic speeds and Mach numbers, plasma beta and flow pressure, IMF clock and cone angles). In addition, for IMP 8 only, several additional parameters are given, including downstream density, shock strength, and various flags related to data quality, etc.). Time coverage for the various spacecraft is non-uniform; IMP 8 coverage is complete from 1973 launch until the June 10, 2000, failure of the magnetometer. Annual, spacecraft-specific files of crossings are ftp accessible as indicated below. Further, the data are accessible via a value-added interface with the ability to subset by parameter, to filter by numeric ranges of any of the parameters, and to generate scatter plots of any one parameter against any other parameter. The data are extensively documented at the value-added interface and references therein. J.H. King 2022-01-01T00:00:00 OMNIWeb plus, NASA Space Physics Data Facility spase://SMWG/Person/Joseph.H.King GeneralContact spase://SMWG/Person/Natalia.E.Papitashvili GeneralContact spase://SMWG/Person/Jan.Merka GeneralContact spase://SMWG/Person/John.D.Richardson GeneralContact spase://SMWG/Person/Ramona.L.Kessel GeneralContact spase://VSPO/Catalog/BS_Multisource spase://VSPO/Catalog/IMP8/MAG/Multisource spase://SMWG/Repository/NASA/GSFC/SPDF Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products SPDF bow shock crossing interface https://omniweb.gsfc.nasa.gov/ftpbrowser/bowshock.html Bow shock crossing data and documentation. Interface supports subsetting, filtering by numeric ranges of any parameters, and 2-parameter scatter plots. FTPS from SPDF (not with most browsers) https://spdf.gsfc.nasa.gov/pub/data/aaa_special-purpose-datasets/aaa_boundary_crossings/bowshock_crossings/ Spacecraft-specific annual files of bow shock crossings HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/aaa_special-purpose-datasets/aaa_boundary_crossings/bowshock_crossings/ In CDF via HTTP from SPDF Text spase://SMWG/Instrument/IMP8/MAG spase://SMWG/Instrument/IMP8/PLS spase://SMWG/Instrument/Magion-4/MAG spase://SMWG/Instrument/Magion-4/VDPS spase://SMWG/Instrument/Geotail/MGF spase://SMWG/Instrument/Geotail/CPI spase://SMWG/Instrument/Cluster-Rumba/FGM spase://SMWG/Instrument/Cluster-Rumba/CIS BowShockCrossing 1973-10-31T00:00:00Z 2002-05-20T00:00:00Z As of 2012/01/16, time spans for individual spacecraft are IMP 8: 1973-10-31 - 2000-06-09 Geotail: 1995-01-01 - 1997-11-02 Magion-4: 1996-02-01 - 1997-07-31 Cluster: 2001-02-02 - 2002-05-20