The PMS One-D record has 8 logical records per physical record. The physical record is 2048 bytes total. Hwrd is a 16 bit integer. Here is the format for each logical record of PMS One-D data. Byte Hwrd Value 00-03 1-2 Recorded Time (10000*SecondsFromMidnight) 04-05 3 TAS (100*TAS) in meters per second 06-07 4 Spare 08-11 5-6 Date (mmddyy) 12-13 7 2-DA Shadow Or Count 14-15 8 2-DA Housekeeping Channel 16-17 9 2-DA TAS Count 18-19 10 2-DA Housekeeping Channel Number 20-21 11 FSSP Size Range (See notes) 22-23 12 FSSP Channel One Count : : : : : : : : : : 50-51 26 FSSP Channel Fifteen Count 52-53 27 Spare FSSP counter 54-55 28 FSSP total (Ch 1-15) 56-57 29 FSSP total strobes 58-59 30 FSSP activity 60-63 31-32 Spare 64-65 33 Particle Spacing Monitor (PSM) Range/Control 66-67 34 PSM Channel One : : : : : : : : : : 94-95 48 PSM Channel Fifteen 96-97 49 1D-C Range/Control 98-99 50 1D-C Channel One Count : : : : : : : : 158-159 80 1D-C Channel Thirty-one Count 160-161 81 1D-C Total (Ch 1-31) 162-163 82 1D-C Spare Counter #1 164-165 83 1D-C Spare Counter #2 166-167 84 1D-C Spare Counter #3 168-175 85-88 Spare 176-177 89 1D-P Range/Control 178-179 90 1D-P Channel One Count : : : : : : : : 206-207 104 1D-P Channel Fifteen Count 208-255 105-128 Spare 1 Notes: For the FSSP, PSM, 1-DC and 1-DP size ranges, each is stored in a halfword with other information on a bit function. With bit 0 being the high order bit, the information is -- bits 0-3 always 0 bit 4 transit delay - should be 0 bit 5 velocity averaging - should be 0 bits 6-7 size range Transit delay and velocity averaging are no longer available. These lines are being used for FSSP total strobes and FSSP activity. The 1-DC probe and the1-DP probe are not adjustable and have no size range. The size range values reflect the setting of the switches on the front pannel of the SEA Model 100. The 1-DP size range halfword and the PSM size range halfword is being used by the display and may have any value. The FSSP probe has four size ranges (0-3) -- 0 - 3.0 to 47.5 microns 1 - 2.0 to 32.0 microns 2 - 1.0 to 16.0 microns 3 - 0.5 to 8.0 microns The FSSP size range is set using the switches on the front pannel of the SEA Model 100. The housekeeping channel number for the 2-D probes identifies a particular housekeeping channel. Only one of the eight housekeeping channels is recorded with each logical record for each probe (the same channel for both probes, however.) 0 - +15 V power supply 1 - mirror temperature 2 - spare 3 - spare 4 - end element #1 5 - end element #32 6 - -15 V power supply 7 - +5 V power supply The -15 volt power supply value is recorded as positive. Each of the values has been changed from a voltage to a frequency. One volt is changed to one kilohertz. The -15 volt and +15 volt power supplies are scaled with a gain of .1 requiring those values to be multiplied by 10 to get the correct frequency. To get the frequency, it is necessary to divide the value by the time interval since the last logical record. The mirror temperature is fitted to a double exponential curve, and the inverse formula is: Temp = -124.2 * ln(ln(freq)) - 1.765) This value is in degrees Centigrade. 1 Sample aArea for the FSSP in square centimeters is 0.00362. FSSP channel boundaries in microns: Channel-0 and channel-1 numbers are from Darrel Baumgardner's calibration software (FSPCL.FTN). Numbers for channel-2 and 3 are from the FSSP manual. Channel 0 2.8, 4.8, 7.6, 12.3, 13.5, 15.4, 19.2, 23.8, 26.8, 31.4, 35.7, 39.5, 43.2, 46.6, 50.2, 53.7 Channel 1 2.7, 3.1, 5.0, 8.3, 11.3, 13.3, 13.6, 15.4, 17.5, 20.7, 23.6, 25.8, 27.7, 30.1, 34.2, 36.8 Channel 2 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 13.0, 13.0, 14.0, 15.0, 16.0 Channel 3 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0 PMS One-DC Channel sample areas in square centimeters. 0.00227, 0.01733, 0.05056, 0.09413, 0.13872, 0.18911, 0.24402, 0.28060, 0.26840, 0.25620, 0.24400, 0.23180, 0.21960, 0.20740, 0.19520, 0.18300, 0.17080, 0.15860, 0.14640, 0.13420, 0.12200, 0.10980, 0.09760, 0.08540, 0.07320, 0.06100, 0.04880, 0.03660, 0.02440, 0.01220 PMS One-DC Channel boundaries in microns. 14.2, 34.0, 53.8, 73.6, 93.4, 113.2, 132.8, 152.4, 172.2, 193.6, 211.8, 231.2, 251.0, 270.6, 290.4, 310.0, 330.0, 350.0, 370.0, 390.0, 410.0, 430.0, 450.0, 470.0, 490.0, 510.0, 530.0, 550.0, 570.0, 590.0, 610.0 PMS One-DC Channel mid-points in microns. 24.1, 43.9, 63.7, 83.5, 103.3, 123.0, 142.6, 162.3, 182.9, 202.7, 221.5, 241.1, 260.8, 280.5, 300.2, 320.0, 340.0, 360.0, 380.0, 400.0, 420.0, 440.0, 460.0, 480.0, 500.0, 520.0, 540.0, 560.0, 580.0, 600.0/ PMS One-DP Channel sample areas in square centimeters. 14.85, 16.57, 15.78, 14.99, 14.20, 13.41, 12.62, 11.83, 11.05, 10.26, 9.47, 8.68, 7.89, 7.10, 6.31 PMS One-DP Channel boundaries in microns. 213.0, 510.0, 813.0, 1104.0, 1404.0, 1698.0, 1992.0, 2289.0, 2586.0, 2877.0, 3180.0, 3465.0, 3750.0, 4050.0, 4350.0, 4650.0 PMS One-DP Channel mid-points in microns. 361.5, 661.5, 958.5, 1254.0, 1551.0, 1845.0, 2140.5, 2437.5, 2731.5, 3028.5, 3322.5, 3607.5, 3900.0, 4200.0, 4500.0 1 The PMS 2D record is 4128 bytes long. Its format is as follows: PMS 2-D RECORD 4128 BYTES, ARRAY(1032) is a 32 bit integer array. NAME(SIZE) TYPE DESCRIPTION LOC IN ARRAY ---------- ---- ----------- --- -- ------ FRONT(1) INT CONSTANT Y'10100001' 0001 IMAGE(1024) INT 2-D IMAGE SLICES 0002-1025 STTIME(1) INT SECONDS FROM MIDNIGHT * 10000 1026 AT START OF 2-D IMAGE NDTIME(1) INT SECONDS FROM MIDNIGHT * 10000 1027 AT END OF 2-D IMAGE STTAS(1) INT2 TAS * 100 AT START OF 2-D IMAGE. 1028 NDTAS(1) INT2 TAS * 100 AT END OF 2-D IMAGE. 1028 SPARE(1) INT SPARE LOCATION 1029 DATE(1) INT DATE (MMDDYY). 1030 SPRPMS(2) INT SPARE LOCATIONS FOR EXPANSION 1031-1032 NOTES : Locations in the array are fullword subscripts. The TAS values are stored in the two half words of fullword ARRAY(1028). EACH ELEMENT OF IMAGE REPRESENTS ONE 2-D IMAGE SLICE. EACH BIT OF EACH SLICE INDICATES WHETHER THE CORRES- PONDING 2-D PHOTO SENSOR WAS LIT OR UNLIT. A LIT SENSOR INDICATES NO IMAGE AND SETS THE BIT. AN UNLIT SENSOR INDICATES AN IMAGE IS PRESENT AND RESETS THE BIT. AS WITH THE PMS SLOW RECORD, THE TIME IS ACCURATE TO ONLY THREE PLACES (AFTER DIVIDING BY 10000). STTIME IS THE TIME WHEN THE 2-D PROBE WAS SIGNALED TO BEGIN COLLECTING 2-D IMAGES. NDTIME IS THE TIME WHEN THE 2-D PROBE'S BUFFER WAS FULL AND IT SIGNALED THAT CONDITION. The diode spacing for this probe is 33 microns. If you have any questions concerning the format, please contact: Martin Brown University of North Dakota Center for AeroSpace Sciences P.O. Box 9022, University Station Grand Forks, ND 58202-9022 vox: 701-777-2954 fax: 701-777-2940