2.2.2 spase://VITMO/NumericalData/TIMED/GUVI/Imaging/Imaging_L1C_Disk TIMED GUVI Imaging Level 1C Disk 2011-10-21T12:00:00.000 This Level 1C data product measured over multiple scans on the disk contains data directly measure by the sensors such as photometer counts, uncertainties, light intensities and pointing information derived from the GUVI raw sensor data and the TIMED Satellite ephemeris data. The data are geolocated at a 150 km altitude, then gridded and binned to a 25 km X 25 km resolution GUVI-based coordinate system consisting of the along orbit position of the sensor and the angle of the scan from the nadir position. This gridding eliminates overlap from scan to scan due to the large instantaneous field-of-view of GUVI (about 12 degrees) and involves coaddition to place the values on a uniform instrument shared grid. The data is then determined whether its from day, night, aurora or twilight pixels. NASA, Andrew B. Christensen spase://SMWG/Person/Andrew.B.Christensen PrincipalInvestigator Imaging L1C Data Information http://guvi.jhuapl.edu/site/data/documents/L1C_datainfo.pdf spase://SMWG/Repository/TIMED/GUVI_POC Online Open GUVI POC Imaging L1C Data Request http://guvi.jhuapl.edu/site/data/data_fetch/l1c.shtml This web page allows the request of data files for this product. To request data: select the year and day then press display. NetCDF GZIP NASA, Andrew B. Christensen spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb http://cdaweb.gsfc.nasa.gov/sp_phys/ TIMED_L1CDISK_GUVI TIMED GUVI Imaging L1C data with subset, plot, list from CDAWeb Text Please acknowledge the support from the CDAWeb team at GSFC/SPDF. Calibrated GUVI Imaging L1C Disk data Level-1C 004 spase://SMWG/Instrument/TIMED/GUVI Radiance 2002-01-08T00:00:00.000 2007-12-11T00:05:38.000 Earth.NearSurface.Thermosphere Earth.NearSurface.Ionosphere Earth.NearSurface.AuroralRegion TIMED GUVI Imaging Disk lower thermosphere ionosphere MLTI Starting Time Starting_Time Starting date/time of file's observation encoded in a 13-digit string and stored as a single netCDF global attribute. yyyydoyhhmmss 1 Dimensions: [1] - this parameter is a single element per file. Temporal Stopping Time Stopping_Time Stopping date/time of file's observation encoded in a 13-digit string and stored as a single netCDF global attribute. yyyydoyhhmmss 1 Dimensions: [1] - this parameter is a single element per file. Temporal Day of Year DOY Date of observation in number of days since start of current year. days Dimensions: [NumPhiBins] - where NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. 1 366 Temporal Time Time Time of observation in number of milliseconds since start of current day. Timestamp marks beginning of interval ms 1e-3>s Dimensions: [NumPhiBins] - where NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. 0 86399999 Temporal Detector Detector Detector # of detector being used unitless Dimensions: [NumPhiBins] - where NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. 1 2 Other Slit position Slit Slit position being used where 0 = closed, 1 = wide, 2 = medium, 3 = narrow, and 4 = unknown. unitless Dimensions: [NumPhiBins] - where NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. 0 4 InstrumentMode Geographic Latitude GeographLat Geographic latitude of pixel center of 25-km x 25-km bin degrees Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. -90.0 90.0 Positional Geographic Longitude GeographLon Geographic longitude of pixel center of 25-km x 25-km bin degrees Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. -180.0 180.0 Positional Geomagnetic Latitude GeomagLat Geomagnetic latitude of pixel center of 25-km x 25-km bin degrees Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. -90.0 90.0 Positional Geomagnetic Longitude GeomagLon Geomagnetic longitude of pixel center of 25-km x 25-km bin degrees Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. -180.0 180.0 Positional Imaging Mode Disk Radiance Data RadianceData Radiance of each of 5 colors (1216, 1304, 1356 A, LBH1 and LBH2) has been geolocated at a 150 km altitude, gridded and binned to a 25 km X 25 km resolution. Rayleighs 5 2 Dimensions: [5,2,NumThetaBins,NumPhiBins] - where 5 is the nmber of colors (NumColors); 2 is the number of rectification types (NumRectificationTypes); NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. Electromagnetic Wavelength 121.6 180.0 nm HI (121.6) 121.6 121.6 OI (130.4) 130.4 130.4 OI (135.6) 135.6 135.6 N2 Lyman-Birge-Hopfield (LBH (1)) 140 150 N2 Lyman-Birge-Hopfield (LBH (2)) 165 180 Pierce Point Altitude PiercePointAlt Pierce Point Altitude km Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. Other Solar Zenith Angle SolarZenithAngle Solar Zenith Angle degrees Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. -90 90 Other Data Region DataRegion Data Region where Bit 0: Dayside 0°<SZA<90°; Bit 1: Nightside 110°<SZA<180°; Bit 2: Twilight 90°<SZA<110°; Bit 3: Polar Region 50° <|Geomaglat|< 90°; Bit 4: Equatorial Region 0°<|Geomaglat|<50°; Bit 5,6: Unused; Bit 7: Unknown region. Valid values are [1 = daylight; 2 = night; 4 = twilight; 8 = Polar; 9 = Daylight Polar; 10 = Night Polar; 12 = Twilight polar; 16 = Equatorial; 17 = Daylight equatorial; 18 = night equatorial; 20 = twilight equatorial; 128 = Geolocation error] unitless Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. 1 128 Other Data Quality Indicator DQI Data Quality Indicator stored as bit-encoded integers where Bits 0-6 are unused; Bit 7: 1 = No Data, 0 = Valid Pixel Data. unitless Dimensions: [NumThetaBins,NumPhiBins] - where NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. Other Systematic Error SystematicError Systematic uncertainty where values of NaNs are given if there is no pixel data Rayleighs 5 2 Dimensions: [5,2,NumThetaBins,NumPhiBins] - where 5 is the nmber of colors (NumColors); 2 is the number of rectification types (NumRectificationTypes); NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. NaN Other Statistical Error StatisticalError Statistical uncertainty where values of NaNs are given if there is no pixel data Rayleighs 5 2 Dimensions: [5,2,NumThetaBins,NumPhiBins] - where 5 is the nmber of colors (NumColors); 2 is the number of rectification types (NumRectificationTypes); NumThetaBins is the number of across-track bins (nominally 119); NumPhiBins is the number of along-track bins (nominally 1647) in an orbital file. NaN Other