March 2001
1 March Nutation damping operations.
Maximum nutation 0.25 deg. half-cone.
2 March Nutation damping operations.
Maximum nutation 0.19 deg. half-cone.
3 March Nutation damping operations.
062.18:38-19:07 29m 2048bps realtime data lost due to a time code translator problem at DSS-40.
DR G06793 refers.
Maximum nutation 0.19 deg. half-cone.
4 March Nutation damping operations.
Maximum nutation level occurred during Kourou pass where measurement of
the nutation angle using ARGOS is not possible.
5 March KEP IFC - 064.20:51 SCET.
064.20:11-20:18 7m 2048bps realtime data lost due uplink resweep at DSS-34 after failed uplink
transfer from Kourou. DR A05177 refers.
Maximum nutation 0.32 deg. half-cone.
6 March Nutation damping operations.
Maximum nutation 0.26 deg. half-cone.
7 March Nutation damping operations.
Maximum nutation 0.20 deg. half-cone.
8 March GRU Routine Noise Test - 067.00:00 SCET.
BAM-E calibration - 067.19:43 SCET.
BAM-I calibration - 067.19:49 SCET.
067.09:27-09:44 17m 512bps realtime data lost due to LMC problem at SPC40. DR A05184 refers.
Maximum nutation 0.21 deg. half-cone.
9 March Nutation damping operations.
068.17:59-18:14 15m 2048 bps realtime data lost due to delay in re-acquiring after bit rate
change.
Maximum nutation 0.22 deg. half-cone.
10 March KEP GAS CR#603: Star (5056), UV-mode - 069.04:00 SCET.
Maximum nutation 0.21 deg. half-cone.
11 March Nutation damping operations.
Maximum nutation 0.21 deg. half-cone.
12 March KEP IFC - 071.19:11 SCET.
Maximum nutation 0.25 deg. half-cone.
13 March KEP GAS CR#604: NG, NG-mode - 072.12:00 SCET.
Maximum nutation 0.23 deg. half-cone.
14 March HED Calibration - 073.20:00 SCET.
073.21:02-21:18 16m 1024bps realtime data lost due to LMC failure at DSS-34.
DR A05204 refers.
Maximum nutation 0.24 deg. half-cone.
15 March Nutation damping operations.
074.01:26-02:34 68m 1024bps realtime data lost due to complex-wide power failure at SPC-40.
074.03:07-03:12 Additional 5m 1024 bps realtime data lost due to extra 1 way -> 2 way switch.
DR A05208 refers.
074.06:50-06:59 26m 1024bps realtime data lost due to antenna halt at DSS-34 and subsequent
074.07:28-07:45 coherency switching. DR A05212 refers.
074.18:16-18:36 30m 2048bps realtime data lost due to antenna halt at DSS-24 and subsequent
074.18:56-19:01 coherency switchings. DR G06831 refers.
074.19:57-20:02
Maximum nutation 0.24 deg. half-cone.
16 March Nutation damping operations.
Maximum nutation 0.25 deg. half-cone.
17 March Nutation damping operations.
076.17:32-17:42 10m 2048 bps realtime data lost due to transmitter re-sweep at DSS-24 after
blown uplink transfer. DR G06836 refers.
Maximum nutation 0.21 deg. half-cone.
18 March Nutation damping operations.
Maximum nutation 0.25 deg. half-cone.
19 March KEP IFC - 078.18:44 SCET.
Maximum nutation 0.20 deg. half-cone.
20 March Nutation damping operations.
Maximum nutation 0.19 deg. half-cone.
21 March SIM HET Calibration - 080.01:00 SCET.
Maximum nutation 0.21 deg. half-cone.
22 March Nutation damping operations.
Maximum nutation 0.21 deg. half-cone.
EPD 10W switch-on
Dump PT & BT - 081.20:50 SCET.
Deschedule REC - 081.20:55 SCET.
Deschedule WDQ - 081.21:00 SCET.
Arm Watchdog - 081.21:04 SCET.
EPD 10W switch-on - 081.21:44 SCET.
Update PT & BT - 081.21:51 SCET.
Disarm Watchdog - 081.22:37 SCET.
Schedule WDQ - 081.22:40 SCET.
Schedule REC - 081.22:45 SCET.
23 March Nutation damping operations.
CLC on command failed because DSS-63 was configured for LCP uplink.
Command transmitted 47m later resulting in larger than usual nutation.
DR L05131 refers.
Maximum nutation 0.34 deg. half-cone.
24 March Nutation damping operations.
Maximum nutation 0.22 deg. half-cone.
25 March Nutation damping operations.
Maximum nutation 0.23 deg. half-cone.
26 March KEP IFC - 085.18:33 SCET.
Maximum nutation 0.26 deg. half-cone.
27 March Nutation damping operations.
Maximum nutation 0.25 deg. half-cone.
28 March HED Calibration - 087.01:00 SCET.
KEP GAS CR#605: NG - indirect orbits - 087.04:00 SCET.
29 March Nutation damping operations.
Maximum nutation 0.20 deg. half-cone.
DSS-14 used instead of DSS-24 due to DSS-24 Azimuth Wheel Axle Bearing
failure. ETRO: 091/2300Z. DR G06863 refers.
30 March KEP GAS CR#607: NG - indirect orbits - 089.17:30 SCET.
CLC on with narrow deadbands was sent over DSS-75 to correct
entry condition.
Due to DSS-24 failure, DSS-15 (downlink only) and DSS-74
(uplink beacon only) were used instead. No uplink transfers
performed into and from DSS-74.
089.16:47-16:55 8m realtime 512 bps data lost due to additional 1-way / 2-way switch.
089.19:52-19:57 5m realtime 1024 bps data lost due to additional 1-way / 2-way switch.
CLC on with wide deadbands was used during DSS-74 pass.
A DSS-74 uplink power drop caused a nutation build-up.
Maximum nutation 1.05 deg. half-cone.
Once on DSS-34 two McElrath manoeuvres were performed.
First McElrath manoeuvre reduced nutation level
from 1.05 deg. to 0.40 deg. half-cone.
Second McElrath manoeuvre reduced nutation level
from 0.45 deg. to 0.14 deg. half-cone.
31 March Nutation damping operations.
Maximum nutation 0.23 deg. half-cone.
DSS-24 back in service.