Document title: Format description for NDADS DE VEFI ac data Project: DE NDADS Datatype: VEFI Super-EID: DOCUMENT There may be other documents also identified by this super-EID. NDADS filename: ACFORMAT.SFDU TRF entry B46597.txt in NSSDC's controlled digital document library. Feb. 1998. Document text follows: ---------------------- TYPE_OF_FILE_NAME: AC FILE FILE_ATTRIBUTES: Variable length, sequential file RECORD_LENGTH: A. HEADER_RECORD: 9 bytes B. DATA_POINT_RECORD: 227 bytes TYPE_OF_FILE_DESCRIPTION: This file contains the VEFI spectrometer data. The first record contains the orbit number, and every record thereafter is a data record containing the date and time of the data in the record, several orbital parameters for that time and the spectrometer data for every channel of each of the three spectrometers. The time interval between data points is normally one second although in some cases it could be 0.5 seconds depending on the mode of the spectrometers, data gaps may also occurr, using the time tag of every record is recommended. FORMAT_OF_THE_HEADER_RECORD: BYTE FIELD TYPE VALUE UNITS NUMBER CONTENTS VI/VR/C RANGE 2 - 9 Orbit number ASCII integer 1 - 8577 - Record format: 1X,I8 FORMAT_OF_THE_DATA_POINT_RECORD: BYTE FIELD TYPE VALUE UNITS NUMBER CONTENTS VI/VR/C RANGE 2 - 6 Date of the data in ASCII integer 81227 - 83047 Julian Date the record 8 - 15 Time of the data in ASCII integer 0 - 86400000 Milliseconds the record 17 - 23 Altitude of the ASCII real 0 - 1300 Kilometers satellite above the spheroid 25 - 31 Geographic latitude ASCII real -90 - 90 Degrees 33 - 39 Geographic longitude ASCII real -180 - 180 Degrees 41 - 47 Magnetic local time ASCII real 0 - 24 Hours 49 - 55 Invariant latitude ASCII real 0 - 84.26 Degrees 57 Antenna spectrometer C X,Y,Z - A is connected to 59 Antenna spectrometer C X,Y,Z - B is connected to 61 Antenna spectrometer C X,Y,Z - C is connected to 63 Spectrometer A gain C H,L - 65 Spectrometer B gain C H,L - 67 Spectrometer C gain C H,L - 69 - 75 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer A 77 - 83 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer A 85 - 91 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer A 93 - 99 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer A 101-107 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 5 of spectrometer A 109-115 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 6 of spectrometer A 117-123 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 7 of spectrometer A 125-131 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 8 of spectrometer A 133-139 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer B 141-147 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer B 149-155 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer B 157-163 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer B 165-171 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 5 of spectrometer B 173-179 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 6 of spectrometer B 181-187 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 7 of spectrometer B 189-195 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 8 of spectrometer B 197-203 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer C 205-211 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer C 213-219 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer C 221-227 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer C Record format: 1X,I5,1X,I8,5(1X,F7.2),6(1X,A1),20(1X,F7.2) Filled data value for all electric field and OA parameters is 9999.99. The gain of the spectrometers is given just for reference, the AC electric field values have already been reduced to common units for both high and low gains. FORMAT_APPLY_SCOPE: This format applies to all the files under the [AC] sub- directory. TYPE_OF_FILE_NAME: AC FILE FILE_ATTRIBUTES: Variable length, sequential file RECORD_LENGTH: A. HEADER_RECORD: 9 bytes B. DATA_POINT_RECORD: 227 bytes TYPE_OF_FILE_DESCRIPTION: This file contains the VEFI spectrometer data. The first record contains the orbit number, and every record thereafter is a data record containing the date and time of the data in the record, several orbital parameters for that time and the spectrometer data for every channel of each of the three spectrometers. The time interval between data points is normally one second although in some cases it could be 0.5 seconds depending on the mode of the spectrometers, data gaps may also occurr, using the time tag of every record is recommended. FORMAT_OF_THE_HEADER_RECORD: BYTE FIELD TYPE VALUE UNITS NUMBER CONTENTS VI/VR/C RANGE 2 - 9 Orbit number ASCII integer 1 - 8577 - Record format: 1X,I8 FORMAT_OF_THE_DATA_POINT_RECORD: BYTE FIELD TYPE VALUE UNITS NUMBER CONTENTS VI/VR/C RANGE 2 - 6 Date of the data in ASCII integer 81227 - 83047 Julian Date the record 8 - 15 Time of the data in ASCII integer 0 - 86400000 Milliseconds the record 17 - 23 Altitude of the ASCII real 0 - 1300 Kilometers satellite above the spheroid 25 - 31 Geographic latitude ASCII real -90 - 90 Degrees 33 - 39 Geographic longitude ASCII real -180 - 180 Degrees 41 - 47 Magnetic local time ASCII real 0 - 24 Hours 49 - 55 Invariant latitude ASCII real 0 - 84.26 Degrees 57 Antenna spectrometer C X,Y,Z - A is connected to 59 Antenna spectrometer C X,Y,Z - B is connected to 61 Antenna spectrometer C X,Y,Z - C is connected to 63 Spectrometer A gain C H,L - 65 Spectrometer B gain C H,L - 67 Spectrometer C gain C H,L - 69 - 75 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer A 77 - 83 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer A 85 - 91 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer A 93 - 99 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer A 101-107 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 5 of spectrometer A 109-115 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 6 of spectrometer A 117-123 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 7 of spectrometer A 125-131 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 8 of spectrometer A 133-139 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer B 141-147 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer B 149-155 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer B 157-163 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer B 165-171 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 5 of spectrometer B 173-179 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 6 of spectrometer B 181-187 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 7 of spectrometer B 189-195 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 8 of spectrometer B 197-203 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 1 of spectrometer C 205-211 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 2 of spectrometer C 213-219 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 3 of spectrometer C 221-227 AC electric field ASCII real 0 - 9999.99 Microvolts/meter values for channel 4 of spectrometer C Record format: 1X,I5,1X,I8,5(1X,F7.2),6(1X,A1),20(1X,F7.2) Filled data value for all electric field and OA parameters is 9999.99. The gain of the spectrometers is given just for reference, the AC electric field values have already been reduced to common units for both high and low gains. FORMAT_APPLY_SCOPE: This format applies to all the files under the [AC] sub- directory.