2.3.2 spase://NASA/NumericalData/DMSP_5D-3/F18/SESS/SSM-Boom/PT1S DMSP F18 Special Sensor Magnetometer, SESS/SSM-Boom, Magnetic Field Measurements taken at 850 km, 1 s Data 2021-04-27T15:38:11Z Defense Meteorology Satellite Program, DMSP, F18 Vector Magnetometer Measurements, 850 km Altitude R.J. Redmon, Data Access provided by NGDC in Coordination with AFRL and the University of Colorado, Boulder. Please acknowledge the Data Providers. If you find Problems, please report them. spase://SMWG/Person/Robert.J.Redmon PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact NGDC, STP, Satellite Data Services https://www.ngdc.noaa.gov/stp/satellite/satdataservices.html NGDC Solar and Terrestrial Physics, STP, Satellite Data Services spase://VSPO/NumericalData/DMSP_5D-3/F18/SESS/SSM-Boom/PT1S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/dmsp/dmspf18/ssm/magnetometer/ Access to Data in CDF Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/dmsp/dmspf18/ssm/magnetometer/ Access to Data in CDF Format via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=DMSP-F18_SSM_MAGNETOMETER&index=sp_phys DMSP-F18_SSM_MAGNETOMETER Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb CDF None R.J. Redmon, Data Access provided by NGDC in Coordination with AFRL and the University of Colorado, Boulder. Please acknowledge the Data Providers. If you find Problems, please report them. Please acknowledge the data providers and CDAWeb when using these data. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi DMSP-F18_SSM_MAGNETOMETER Web Service to this product using the HAPI interface. CSV R.J. Redmon, Data Access provided by NGDC in Coordination with AFRL and the University of Colorado, Boulder. Please acknowledge the Data Providers. If you find Problems, please report them. Please acknowledge the data providers and CDAWeb when using these data. Calibrated spase://SMWG/Instrument/DMSP_5D-3/F18/SESS/SSM-Boom MagneticField 2010-01-01T00:00:00.000 2014-12-30T23:59:59.999 PT1S Earth.Magnetosphere Earth.Magnetosphere.Polar Earth.NearSurface Earth.NearSurface.AuroralRegion Earth.NearSurface.EquatorialRegion Earth.NearSurface.Ionosphere Earth.NearSurface.PolarCap Epoch Time Epoch Epoch Time, Default This parameter exhibits an increasing monotonic progression. PT1S ms 1e-3>s Epoch LinearScale 01-Jan-1990 00:00:00.000 31-Dec-2029 23:59:59.999 31-Dec-9999 23:59:59.999 Temporal Spacecraft Position, ECI Time series defined by using: EPOCH SC_ECI Spacecraft Position, Earth Centered Inertial, ECI, Cartesian Coordinates Epoch is True of Date, TOD. These ECI Coordinates are calculated from an SPDF SSC Locator 1 min Ephemeris using an Eight Order Interpolation, Burden, R.L., and Faires, J.D., Numerical Analysis, 5th Ed., PWS Publishing Company, Boston, 1993. Using SPDF Methods, the expected Accuracy is on the Order of a few km. PT1S km 1e3>m Cartesian GEI TimeSeries E12.2 LinearScale 3 x_ECI 1 y_ECI 2 z_ECI 3 -7500.0 7500.0 NaN Vector Positional Spacecraft Latitude, GEO Time series defined by using: EPOCH SC_GEOCENTRIC_LAT Spacecraft Latitude, Geographic Inertial, GEO, Coordinates Calculated by using IDL Astro Library Function ECI2GEO PT1S ° 0.0174532925>rad Spherical GEO TimeSeries SC_GEOCENTRIC_LAT E12.2 LinearScale -90.0 90.0 NaN DirectionAngle.ElevationAngle Positional Spacecraft Longitude, GEO Time series defined by using: EPOCH SC_GEOCENTRIC_LON Spacecraft Longitude, Geographic Inertial, GEO, Coordinates Calculated by using IDL Astro Library Function ECI2GEO PT1S ° 0.0174532925>rad Spherical GEO TimeSeries SC_GEOCENTRIC_LON E12.2 LinearScale 0.0 360.0 NaN DirectionAngle.AzimuthAngle Positional Spacecraft Geocentric Distance Time series defined by using: EPOCH SC_GEOCENTRIC_R Spacecraft Geocentric Distance PT1S km 1e3>m TimeSeries SC_GEOCENTRIC_R E12.2 LinearScale 6378.0 7500.0 NaN Magnitude Positional Spacecraft Latitude, AACGM Time series defined by using: EPOCH SC_AACGM_LAT Spacecraft Latitude, Altitude Adjusted Corrected Geomagnetic, AACGM, Coordinates Calculated by using the SuperDARN AACGM IDL Library. Values are the Result of linearly interpolating between two nearest AACGM 5 Year Epochs. PT1S ° 0.0174532925>rad Spherical CGM TimeSeries SC_AACGM_LAT E12.2 LinearScale -90.0 90.0 NaN DirectionAngle.ElevationAngle Positional Spacecraft Longitude, AACGM Time series defined by using: EPOCH SC_AACGM_LON Spacecraft Longitude, Altitude Adjusted Corrected Geomagnetic, AACGM, Coordinates Calculated by using the SuperDARN AACGM IDL Library. Values are the Result of linearly interpolating between two nearest AACGM 5 Year Epochs. PT1S ° 0.0174532925>rad Spherical CGM TimeSeries SC_AACGM_LON E12.2 LinearScale 0.0 360.0 NaN DirectionAngle.AzimuthAngle Positional Spacecraft Local Time, AACGM Time series defined by using: EPOCH SC_AACGM_LTIME Spacecraft Local Time, Altitude Adjusted Corrected Geomagnetic, AACGM, Coordinates Calculated by using the SuperDARN AACGM IDL Library. Values are the Result of linearly interpolating between two nearest AACGM 5 Year Epochs. PT1S h 3600>s Spherical CGM TimeSeries SC_AACGM_LTIME E12.2 LinearScale 0.0 24.0 NaN DirectionAngle.AzimuthAngle Positional Magnetic Field, Spacecraft Frame Time series defined by using: EPOCH B_SC_OBS_ORIG Magnetic Field as originally measured in Spacecraft Frame X is Geodedic Nadir, Down, Y is along Spacecraft Track, the Ram Direction, Z is Across-Track to the Right. Note, the Pertrubations in this Variable have been recomputed from the Observed B-Field. IGRF11 was run using this Day as Epoch to compute a new, more accurate Geocentric Location that was rotated into Spacecraft Coordinates and then removed. PT1S nT 1e-9>T Cartesian SC TimeSeries E12.2 LinearScale 3 Bx_SC 1 By_SC 2 Bz_SC 3 -100000.0 100000.0 NaN Vector Magnetic Delta-B, measured minus IGRF, Spacecraft Frame Time series defined by using: EPOCH DELTA_B_SC_ORIG Delta Magnetic Field, Delta-B, which is equal to the originally measured Magnetic Field minus the International Geomagnetic Reference Field, IGRF, Model Magnetic Field, Spacecraft Frame X is Geodedic Nadir, Down, Y is along Spacecraft Track, the Ram Direction, Z is Across-Track to the Right PT1S nT 1e-9>T Cartesian SC TimeSeries E12.2 LinearScale 3 dB X_SC 1 dB Y_SC 2 dB Z_SC 3 -2000.0 2000.0 NaN Vector Magnetic Baseline corrected Delta-B, GEO Time series defined by using: EPOCH DELTA_B_GEO Baseline corrected Delta-B, Geographic, GEO, Spherical, East, North, Up, Coordinates Finite Differences between adjacent Points on Spacecraft Track were used to determine along Track and across Track Unit Vectors in GEO. No Altitude Change between adjacent Points was assumed. Baseline Correction, F. Rich's MFIT Procedure, is Polynomial Fit every Half-Pass to each Component of Delta-B in Spacecraft Coordinates by using only Data from Regions equatorward of the DMSP Auroral Boundary from the CEDAR Database. PT1S nT 1e-9>T Spherical GEO TimeSeries E12.2 LinearScale 3 BC dB East 1 BC dB North 2 BC dB Up 3 -2000.0 2000.0 NaN Vector Magnetic Baseline corrected Delta-B, APX Time series defined by using: EPOCH DELTA_B_APX Baseline corrected Delta-B, Modified Apex, APX, Coordinates, Reference Height 110 km Coordinates transformed with APEX-PYTHON, NCAR HAO, with Reference Altitude equal to 110 km, See Richmond, J. Geomag. Geoelec., 1995. Baseline Correction, F. Rich's MFIT Procedure, is Polynomial Fit every Half-Pass to each Component of Delta-B in Spacecraft Coordinates by using only Data from Regions equatorward of the DMSP Auroral Boundary from the CEDAR Database. PT1S nT 1e-9>T Spherical LGM TimeSeries E12.2 LinearScale 3 BC dB d1, nearly eastward 1 BC dB d2, nearly equatorward 2 BC dB d3, nearly upward 3 -2000.0 2000.0 NaN Vector Magnetic Baseline corrected Delta-B, Spacecraft Frame Time series defined by using: EPOCH DELTA_B_SC Baseline corrected Delta-B, Spacecraft Frame X is Geodedic Nadir, Down, Y is along Spacecraft Track, the Ram Direction, Z is Across-Track to the Right. Baseline Correction, F. Rich's MFIT Procedure, is Polynomial Fit every Half-Pass to each Component of Delta-B in Spacecraft Coordinates by using only Data from Regions equatorward of the DMSP Auroral Boundary from the CEDAR Database. PT1S nT 1e-9>T Cartesian SC TimeSeries E12.2 LinearScale 3 BC dB X_SC 1 BC dB Y_SC 2 BC dB Z_SC 3 -2000.0 2000.0 NaN Vector Magnetic Spacecraft Latitude, APX Time series defined by using: EPOCH SC_APEX_LAT Spacecraft Latitude, Modified Apex Geomagnetic, APXGM, Coordinates, Reference Height 110 km Calculated by using Apex-Python, which is based on Apex Fortran Code available from CEDAR Database with the nearest Year Epoch PT1S ° 0.0174532925>rad Spherical LGM TimeSeries SC_APEX_LAT E12.2 LinearScale -90.0 90.0 NaN DirectionAngle.ElevationAngle Magnetic Spacecraft Longitude, APX Time series defined by using: EPOCH SC_APEX_LON Spacecraft Longitude, Modified Apex Geomagnetic, APXGM, Coordinates, Reference Height 110 km Calculated by using Apex-Python, which is based on Apex Fortran Code available from CEDAR Database with the nearest Year Epoch PT1S ° 0.0174532925>rad Spherical LGM TimeSeries SC_APEX_LON E12.2 LinearScale -180.0 180.0 NaN DirectionAngle.AzimuthAngle Magnetic Spacecraft Local Time, APX Time series defined by using: EPOCH SC_APEX_MLT Spacecraft Local Time, Modified Apex Geomagnetic, APXGM, Coordinates, Reference Height 110 km Calculated by using Apex-Python, which is based on Apex Fortran Code available from CEDAR Database with the nearest Year Epoch PT1S h 3600>s Spherical LGM TimeSeries SC_APEX_MLT E12.2 LinearScale 0.0 24.0 NaN DirectionAngle.AzimuthAngle Magnetic Spacecraft Region Code Time series defined by using: EPOCH AURORAL_REGION Spacecraft Region Code: 1=Equatorial, 2=Auroral, 3=Polar 0-No Boundary Identified, 1-Equatorward of the Auroral Zone, 2-Auroral Zone, 3-Polar Cap PT1S (2=Auroral) TimeSeries AURORAL_REGION E12.2 LinearScale 0.0 3.0 NaN Other Auroral Boundary Determination, FOM Time series defined by using: EPOCH AURORAL_BOUNDARY_FOM Auroral Boundary Determination Figure of Merit, FOM: OK if Equal to 2 or Greater Typical Range 0-4. Less than 2 is Suspect. See the DMSP CDF User Manual for full Specification of FOM Computation. PT1S (OK>=2) TimeSeries AURORAL_BOUNDARY_FOM E12.2 LinearScale 0.0 5.0 NaN Uncertainty Other Orbit Index by Day Time series defined by using: EPOCH ORBIT_INDEX Integer representing the Orbit of the Day, signed by Hemisphere: >0=Northern, <0=Southern Orbit Start and End are determined by Crossings of the Apex Magnetic Equator. A value of 0 denotes the first Equator Crossing of the Day. PT1S TimeSeries ORBIT_INDEX E12.2 LinearScale -18.0 18.0 NaN Other Spacecraft Ram Velocity Direction, Unit Vector, GEO Time series defined by using: EPOCH SC_ALONG_GEO Spacecraft Ram Velocity Direction, Unit Vector, Geographic, GEO, Coordinates This is an Estimate, based on a Spherical Trigonometry Approach by using a Great-Circle Arc between adjacent Points, See the User Manual. PT1S Cartesian GEO TimeSeries E12.2 LinearScale 3 along_SC East 1 along_SC North 2 along_SC Up 3 -1.0 1.0 NaN Vector Positional Unit Vector across the Spacecraft Track, GEO Time series defined by using: EPOCH SC_ACROSS_GEO Unit Vector across the Spacecraft Track to the Left and Orthogonal to the Spacecraft Ram Velocity Direction, Geographic, GEO, Coordinates This is an Estimate, based on a Spherical Trigonometry Approach by using a Great-Circle Arc between adjacent Points, See the User Manual. PT1S Cartesian GEO TimeSeries E12.2 LinearScale 3 across_SC East 1 across_SC North 2 across_SC Up 3 -1.0 1.0 NaN Vector Positional