file: TORUS1:[GLL_RAW.INFO]UVS_BCE_CMDS.LIS UVS COMMAND FILE Last Updated: April 8, 1997 Edited Oct 01, 1997 Description added May 20,98 KES/WRP Legend: Y = worked, N = didn't work, U = unused, NA = repeated command look for other tests of same command ---------------------------------------------------------------------------------------------------------------------------------- cmd cmd bytes Starting w/l BCE Flight description (hex) Worked Worked ---------------------------------------------------------------------------------------------------------------------------------- 1) E5 84 21 33 96 00 00 33/33 Y U G 264 step ON 1849A(2nd) 2) 07 04 81 00 9C 00 00 00/0F Y Y F full scans 3) 07 04 81 C8 9C 00 00 C8/D7 Y U F full scans (extended wl) 4) D9 84 81 A7 66 00 00 A7/A7 Y U F 44 step on 679 to 722 5) 07 04 21 2C 9D 05 08 2C/33 Y U G full scans (extended wl) 6) C1 84 21 72 05 00 F5 72/67 Y Y G 1 step 1239.8 and 1610.9 7) D9 84 21 F2 75 00 F6 F2/E8 N U G 44 step 1435.3-1500.2 and 1800.5-1894.3 8) D3 84 61 D5 4E 05 63 D5/72 Y N N/G 22 step 4040.9-4098.7 and 1239.8-1272.1 9) C1 84 41 65 06 00 7B 65/E0 Y Y N 1 step 3728.2 and 4071.2 10) 07 04 A1 00 9c 01 2C 00/3B Y N F/G full scans 11) C1 84 31 2C 05 00 00 2C/2C Y Y G 1 step hv off 12) DF 84 21 2C 7D 00 2C 2C/58 Y Y G 88 step lyman alpha 1131.5-1265.9 and 1199.7-1333.4 13) 07 04 21 2C 9D 00 00 2C/3B Y Y G full scans 14) C1 84 21 7E 05 00 36 7E/B4 Y Y G 1 step SII/bkgd 1258.2 and 1341.0 15) D3 84 A1 08 4D 00 6A 08/72 Y Y F/G 22 step OII/SII 2436.8-2501.0 and 1239.8-1272.1 16) C1 84 21 9C 05 00 0A 9C/A6 Y Y G 1 step O I/bkgd 1304.3 and 1319.6 17) 07 04 81 00 9C 00 00 00/0F Y Y F full scans 18) D1 84 21 5A 45 00 39 5A/A2 Y Y G 16 step lyman alpa/OI 130 1202.8-1225.9 and 1290.5-1313.5 19) D7 84 41 6F 5D 00 00 6F/6F Y Y N 33 step OH 3016.9-3111.2 20) E3 84 21 45 8D 00 00 45/F4 Y Y G 176 step 1170.3-1438.3 21) D3 84 61 D5 4E 05 63 D5/72 NA NA N/G 22 step SII/SII 4040.9-4098.7 and 1239.8-1272.1 22) C1 84 41 65 06 00 7B 65/E0 NA NA N 1 step OII/SII 3728.2 and 4071.2 23) D1 84 21 94 45 00 52 94/F5 N N G 16 step 0I/SI 1292.0-1315.0 and 1417.1-1439.8 24) C1 84 21 EB 05 04 17 EB/D4 Y Y G 1 step SI/bkgd 1424.7 and 1389.8 25) C1 84 21 62 05 00 09 62/6B Y N G 1 step lyman alpha/bkgd 1215.1 and 1229.9 26) D1 84 41 D8 46 04 7b D8/6C N U N 16 step SII/OII 4049.2-4090.5 and 3705.6-3748.0 27) E3 84 41 A1 8C 01 A0 A1/F0 Y U N 176 step extended w/l ????-3085.8 and 3626.2-4115.2 28) C1 84 21 7B 05 00 EC 7B/67 Y U G 1 step 1253.6 and 1610.9 29) DD 84 21 48 75 00 00 48/48 Y N G 66 step 1174.9-1275.2 30) D3 84 21 72 65 01 2A 72/9C Y N G 22/44 step 1239.8-1272.1 and 1689.3-1752.4 31) D1 84 41 5D 46 00 7B 5D/E7 N N N 16 step OII/SII 3705.6-3748.0 and 4049.2-4090.5 32) D7 84 41 78 5D 00 00 78/78 Y Y N 33 step 3043.5-3137.6 33) C1 84 21 0C 06 00 18 0C/24 Y Y G 1 step SI/bkgd 1474.6 and 1510.7 34) C1 84 21 72 05 00 F5 72/67 NA NA G 1 step 1239.8 and 1610.9 35) 07 04 61 2C 9D 00 00 2C/3B Y Y N/G full scans 36) E7 84 61 00 9C 01 2C 00/3B Y Y N/G full scan (N chan. in F range) 37) D9 84 21 F2 75 00 F6 F2/E8 NA NA G 44 step dayglow 1435.3-1500.2 38) D1 84 81 32 45 00 00 32/41 Y U F 16 step 2565.1-2610.7 39) E5 84 A1 42 4C 02 CE 42/10 N U F/G 264/22 step 1823.6-2635.0 and 1858.4-1888.6 40) D3 84 81 4F 4C 02 6C 4F/BB N U F 22 step on 1849A and 691 step(extended w/l) 41) D3 84 21 A6 4C 02 63 A6/D9 N U G 22 step on 1849A (1st and 2nd order) 42) E5 84 61 EC 4D 04 7A U U N 176 step,G 22step 43) D5 84 21 29 54 04 3B 29/EE Y N G 1st order E6 BRTLMB (don't use, did not work in flight unit) 44) D3 84 21 B3 4D 00 51 B3/04 Y U G 22 step 1339.5-1371.5 and 1462.5-1494.2 45) D3 84 21 91 4D 00 22 91/B3 N U GRATING TEST CMD 46) D3 84 21 91 4D 00 73 91/04 N U GRATING TEST CMD 47) E3 84 21 1A 8E 00 00 1A/C9 Y Y hydrocarbons 1496.0 - 1755.0 48) E5 84 21 C2 95 00 00 C2/C2 Y U GRATING TEST CMD 49) E5 84 21 E1 95 00 00 E1/E1 Y U GRATING TEST CMD 50) D3 84 21 2C 4D 00 00 2C/2C Y U GRATING TEST CMD 51) D3 84 21 6C 4D 00 00 6C/6C Y U GRATING TEST CMD 52) D3 84 21 AC 4D 00 00 AC/AC Y U GRATING TEST CMD 53) D3 84 21 EC 4D 00 00 EC/EC Y U GRATING TEST CMD 54) D3 84 21 2C 4E 00 00 2C/2C Y U GRATING TEST CMD 55) D3 84 21 6C 4E 00 00 6C/6C Y U GRATING TEST CMD 56) D3 84 21 AC 4E 00 00 AC/AC Y U GRATING TEST CMD 57) D1 84 21 AC 46 00 00 AC/AC N U GRATING TEST CMD 58) 07 04 41 2C 9D 00 00 2C/3B Y Y N full scans 59) E5 84 41 25 94 00 00 25/25 Y Y N 264 step ??? 60) DF 84 41 2C 7D 00 00 2C/2C Y Y N 88 step 2818.1-3075.9 61) C1 84 41 D8 06 00 08 D8/E0 Y N N 1 step 4049.2 and 4071.2 62) D3 84 41 5B 4E 00 7A 5B/D5 Y N N 22 step 3700.0-3759.3 and 4024.4-4082.2 63) DB 84 A1 68 6D 00 7F 68/16 Y Y F/G 48 step E6 PLUMON 2729.0-2870.7 and 1418.6-1489.7 64) D1 84 21 5A 45 00 00 5A/69 Y Y G 16 step lyman alpha 1202.8-1225.9 65) D1 84 21 B6 45 00 00 B6/C5 Y Y G 16 step 1344.1-1367.6 66) D1 84 21 94 45 00 00 94/A3 Y U G 16 step 1292.0-1315.0 67) 07 04 61 2C 9D 00 00 2C/3B Y Y N-G full scans 68) D5 84 21 29 54 04 3B 29/EE NA NA G 1st order E6 BRTLMB (don't use, did not work in flight) 69) DB 84 21 80 6D 00 7B 80/2A Y Y G7 BRTLMB G 48 step 1261.3-1333.4 and 1448.9-1519. 70) 07 04 C1 00 9C 01 2C 00/3B Y U F-N full scans 71) 07 04 41 2C 9D 00 00 2C/3B NA NA N-N full scans (same as # 58) 72) 07 04 C6 00 9C 01 2C 00/3B Y Y F-N full scans 1ms integration, Limb sensor OVERRIDE 73) D3 84 21 72 4D 00 92 72/04 N U DON'T USE GG 22 step 1239.8 - 1272.1 and 1462.5 -1494.2 74) D3 84 21 72 4D 00 71 72/E3 N U DON'T USE GG 22 step 1239.8 - 1272.1 and 1412.6 - 1444.4 75) D1 84 21 94 45 00 22 94/C5 N U DON'T USE GG 16 step 1292.0-1315.0 and 1344.1 - 1367.0 76) D3 84 21 72 4D 00 41 72/B3 Y U GG 22 step 1239.8 - 1272.1 and 1339.5 -1371.5 77) D3 84 21 54 4D 00 B0 54/04 Y U GG 22 step 1193.5-1225.9 and 1462.5-1494.2 78) D1 84 21 5A 45 00 AD 5A/16 N U GG 16 Step 1216 1480 79) 07 04 41 00 9C 01 2C 00/3B Y U NN full 3130/3589 80) D1 84 21 B6 45 00 51 B6/16 Y U GG 16 step 1344.1 - 1367.0 and 1467 - 1489.7 81) D1 84 21 07 46 00 00 07/16 Y? U GG 16 step 1467 - 1489.7 82) D1 84 21 94 45 00 73 94/16 Y? U GG 16 step 1292.0 - 1315.0 and 1467 - 1489.7 83) D1 84 21 5B 45 00 5B 5B/C5 Y? U GG 1204.3 - 1227.4 and 1344.1 - 1367.0 84) C1 84 21 2C 45 00 00 2C/3B Y U GG full scans HV off BAD COMMAND 85) D9 84 41 69 65 00 00 69/69 Y U NN 44 step centered on 3064 A 86) D7 84 81 D0 5D 00 00 D0/D0 Y U FF 33 step centerend on 3090 87) D3 84 21 04 4E 00 00 04/04 N U GG 22 step on 1479A 88) C1 84 21 BE 05 00 17 BE/D5 Y U GG 1 step on 1356 and 1390 ============================================================================== Description of Results added May 20, 1998 - KES/WRP In the post-orbit-insertion load known as J0CD, the new Phase 2 software was loaded to the spacecraft and all the science instruments. The UVS data began to report a different Starting Wavelength than the value which was expected for the command issued. This difference became known as the 'grating error'. The science data during the error condition indicated there was a grating offset taking place during the error condition: the G-channel full scans indicated a Lyman-alpha 'ghost' sitting to the right of the correctly positioned line (in the real-time-summation buffer.) This was an indication that the grating was stepping correctly for some time during the summation period but incorrectly for some other portion of the period. The magnitude of the counts in the ghost were proportional to the difference between the expected Starting Wavelength (SW) and the reported SW. In these L-a cases the ghost was about 10-11 grating steps to the right of the correct position. During J0CD the spacecraft was very cold (about 125 DN for the Logic Temp.) and McClintick had reported seeing a one fringe (10.5 grating steps) offset during his calibration activities when operating at -30 deg C. This inform- ation indicated we should ask for the UVS Heater to be on at all times. The Project agreed. The grating 'error' continued to be seen, however, even at warmer temperatures, in some commands. So ground tests were run at LASP on the BCE to try to determine the problem. Eventually, the tests did not clearly indicate the problem so testing followed a new approach: a limited number of specific commands needed to succeed with our UVS science objectives were tested. If they worked on the BCE we used them in flight. Some commands never worked on the BCE, some worked on the BCE but did not work consistently in flight, as indicated above. Beginning in orbit C9, a set of 'grating exercise' commands were used during orbit cruise periods to gather more statistics as to the failure rate. These in hand, along with the set of Torus commands, an investigation of the grating error was made. (See that report: J.Adams, May 1998.) It's basic conclusion was that the grating drive works better at warmer temperatures, especially when stepping a long distance; no relation was found with radiation or command hysteresis. The following are a few details, in summary form, of the BCE test results. * The microprocessor (uP) has 1/3 second between spectra integration periods. That time is the limit on the number of grating steps that can be reached by the first integration. The uP will continue to move the grating toward the commanded grating position until it reaches it. If the mini-scan step size forces the grating to move down before the up movement reaches the starting position then the uP seems to get totally lost. The flyback and step out at RIM end/start also has to move in that 1/3 second but the drive moves at 10 K Hertz/small-step on flyback and 600 micro sec/step on step-out. That yields a limit of about 246 grating steps for the initial position and 550 steps for the delta position if the commanded position is to be achieved by the first integration. * The RIM flyback does seem to re-initialize the grating position error. * The backup grating encoder was tested on the ground (in both cold and oven conditions) and worked; the flight backup failed to function at all. * The McClintock calibration document mentions a full fringe offset (10.5 grating steps) "when operated at -30d C". * Some commands never do work. They apparently ask for too large of a step out. (Case #39 is one example.) * Logic Temperature is measured at the end of the logic box; I think it's location is above the detector box end. Thelma had just one blueprint showing it's location and I can no longer find it.