Data Set Summary ================ Data Set ID: ULY-J-EPAC-4-SUMM-ALL-CHAN-1HR-V1.0 Instrument: EPAC Instrument P.I.: Erhard Keppler Data Supplier: Erhard Keppler Data sampling rate: 1 hr Data Set Start time: 1992-01-25T00:00:00.000Z Data Set Stop time: 1992-02-28T23:00:00.000Z Naming convention ----------------- Data files in this data set are named according to the convention: Tyyddd.TAB where yy = the last two digits of the year ('92' for 1992) ddd = the day of the year covered by the file Record format ------------- These files can be read according to the FORTRAN format statement: '(a24,287(1x,1pe12.5))' where 'a24' is the time stamp in PDS format: yyyy-mm-ddThh:mm:ss.sssZ. The individual elements of the time field can be read according to the statement: '(i4,4(1x,i2),1x,f6.3,1x)' year, month, day, hour, minute, seconds. thus a record may be alternatively be read according to the format: '(i4,4(1x,i2),1x,f6.3,1x,287(1x,1pe12.5))' Data column descriptions ------------------------ time a24 spacecraft event time omnidirectional-proton telescopes -- 4 1pe12.5 format omni-directional proton fluxes from each of Omnidirectional- Proton Sin Averages 1-4 (520-1423 keV) prtl telescope structure -- this structure contains 8 sectors of data for a one of the EPAC Proton-Rate Sectored Telescopes. It is repeated twice, once each for PRTL telescopes 2-3. prtl sector data -- 8 1pe12.5 format proton flux values for each of sectors 1-8 of Proton-Rate Sectored Telescope 2 (~500-1000 keV) prtl3 sector data -- 8 1pe12.5 format proton flux values for each of sectors 1-8 of Proton-Rate Sectored Telescope 3 (~500-1000 keV) eltl1 1pe12.5 Electrons Low Spin Avgs 1 (100-380 keV) ehtl1 1pe12.5 Electrons High Spin Avgs 1 (E > 180 keV) eltl2 1pe12.5 Electrons Low Spin Avgs 2 (100-380 keV) ehtl2 1pe12.5 Electrons High Spin Avgs 2 (E > 180 keV) eltl3 1pe12.5 Electrons Low Spin Avgs 3 (100-380 keV) ehtl3 1pe12.5 Electrons High Spin Avgs 3 (E > 180 keV) eltl4 1pe12.5 Electrons Low Spin Avgs 4 (100-380 keV) ehtl4 1pe12.5 Electrons High Spin Avgs 4 (E > 180 keV) erl 1pe12.5 Event-Rate Low Omnidirectional Channel erm 1pe12.5 Event-Rate Medium Omnidirectional Channel erh 1pe12.5 Event-Rate High Omnidirectional Channel pstl telescope structure -- this structure contains 8 channels of proton flux data for one of the EPAC Proton Spectral Telescopes. It is repeated 4 times for each of PSTL telescopes 1-4. pstl channel structure -- this structure contains data for a single channel of one of the EPAC Proton Spectral Telescopes. It is repeated 8 times, once each for channels 1-8. pstl sector data -- 8 1pe12.5 format proton flux values for sectors 1-8 for a single channel of one of the PSTL telescopes Data Record Structure. This figure represents the structure of a single data record. Note that the 'PRTL TELESCOPE STRUCTURE,' and 'PSTL CHANNEL STRUCTURE' objects are not individual columns, but rather grouping of columns. ______________ ______________ ____ ____ ____ |PRTL TELESCOPE| ____ ____ ___ |PSTL TELESCOPE| | ||OPTL| |OPTL|| STRUCTURE ||ELTL||EHTL| |ERH|| STRUCTURE | |TIME|| 1 |...| 4 ||(repeated for || 1 || 1 |...| ||(repeated for | |____||____| |____|| PRTL2 and 3) ||____||____| |___|| PSTL 1-4) | |______________| |______________| PRTL TELESCOPE STRUCTURE. This figure represents the internal structure of the PRTL TELESCOPE STRUCTURE container object. This structure is repeated for both PRTL2, and PRTL3. ___________________________ | ______ ______ ______ | ||PRTL ||PRTL | |PRTL || ||SECTOR||SECTOR|...|SECTOR|| ||1 DATA||2 DATA| |8 DATA|| ||______||______| |______|| |___________________________| PSTL TELESCOPE STRUCTURE. This figure represents the internal structure of the PSTL TELESCOPE STRUCTURE container object. This structure is repeated for each of PSTL1, PSTL2, PSTL3, and PSTL4. _____________________________________________________________________ | CHANNEL 1 CHANNEL 2 CHANNEL 8 | | ____________________ ____________________ ____________________ | || ____ ____ ____ || ____ ____ ____ | | ____ ____ ____ || |||PSTL||PSTL| |PSTL||||PSTL||PSTL| |PSTL|| ||PSTL||PSTL| |PSTL||| |||SEC1||SEC2|..|SEC8||||SEC1||SEC2|..|SEC8||...||SEC1||SEC2|..|SEC8||| |||DATA||DATA| |DATA||||DATA||DATA| |DATA|| ||DATA||DATA| |DATA||| |||____||____| |____||||____||____| |____|| ||____||____| |____||| ||____________________||____________________| |____________________|| |_____________________________________________________________________| Missing data flag value ----------------------- Any data column whose value is -9.99999e+10 is a missing data value. Data Description ================ EPAC RECORD FORMAT (REFERENCE: [KEPPLERETAL1992A] page 322, table 4) UDS REPRESENTATIVE: M. BRUNS (NSP::LINMPI::LINAX1::BRUNS) NOTES: UDS data files ============== These are ASCII files. The data entries in the files are always single precision float values containing one hour averages in Flux / (s cm**2 sr) starting at midnight for each day. The corresponding times are integers indicating start of average. The entries are separated by blanks. Then the total length of the ASCII records are: 3757 Bytes with 24 records per file. Bad or absent data are flagged with -9.99999e+10. The data entries are: Omnidirectional-Protons (520-1423 keV) Spin Averages Telescope 1-4 (OPTL1-4) Proton-Rate Sectored (~500-1000 keV) Telescope 2,3 Sector 1-8 (PRTL2,3) Electrons Low (100-380 keV) Spin Averages Telescope 1-4 (ELTL1-4) Electrons High (E > 180 keV) Spin Averages Telescope 1-4 (EHTL1-4) Event-Rate Low, Medium and High Omnidirectional Channels (ERL,ERM,ERH) Proton Spectral Telescope 1-4 Channel 1-8 Sector 1-8 (PSTL1-4) PS energy channels in keV: Channel 1 2 3 4 5 6 7 8 Telescope TL1 508- 520- 541- 574- 629- 768- 990- 1423-1559 TL2 508- 520- 541- 574- 633- 768- 994- 1431-1559 TL3 508- 520- 541- 574- 633- 772- 994- 1435-1493 TL4 508- 520- 541- 574- 633- 768- 990- 1423-1546 The record structure is as follows: 1 character string (24 Bytes) with the format yyyy-mm-ddThh:mm:ss.sssZ yyyy = year mm = month dd = day hh = hours mm = minutes ss.sss = seconds 287 reals (13 Bytes, e.g. -1.23456E+03) for OPTL1 OPTL2 OPTL3 OPTL4 PRTL2 (8 sectors) PRTL3 (8 sectors) ELTL1 EHTL1 ELTL2 EHTL2 ELTL3 EHTL3 ELTL4 EHTL4 ERL ERM ERH PSTL1 (8 channels with 8 sectors; CH1SE1, CH1SE2, ..., CH2SE1, ...) PSTL2 (8 channels with 8 sectors) PSTL3 (8 channels with 8 sectors) PSTL4 (8 channels with 8 sectors)