NOAA-17 problems

DK3WN


NOAA-17 IR (night) image from today, 19:36 UTC (SatSignal)

NOAA analysis: mean signal: 2987.24
832 Hz tone: average: 0.134 (req: 0.015), peak: 0.347 (req: 0.055)
analyser recognised NOAA APT
Net signal analysis time: 178 msec
ACF (for plot) analysis time: 6 msec.
NOAA sync loss at line 46, relock after 0.334 seconds
NOAA sync loss at line 116, relock after 0.335 seconds
NOAA sync loss at line 160, relock after 0.168 seconds
NOAA sync loss at line 228, relock after 0.334 seconds
NOAA sync loss at line 250, relock after 0.335 seconds
NOAA sync loss at line 288, relock after 0.335 seconds
NOAA sync loss at line 328, relock after 0.168 seconds
NOAA sync loss at line 395, relock after 0.334 seconds
NOAA sync loss at line 490, relock after 0.334 seconds
NOAA sync loss at line 568, relock after 0.461 seconds
NOAA sync loss at line 570, relock after 0.461 seconds
NOAA sync loss at line 573, relock after 0.261 seconds
NOAA sync loss at line 575, relock after 0.371 seconds
NOAA sync loss at line 577, relock after 0.461 seconds
NOAA sync loss at line 579, relock after 0.083 seconds
NOAA sync loss at line 580, relock after 0.295 seconds
NOAA sync loss at line 582, relock after 0.421 seconds
NOAA sync loss at line 616, relock after 0.501 seconds
Signal level is OK
NOAA: From wedge telemetry channel A is AVHRR sensor 2 (0.86um visible)
NOAA: From wedge telemetry channel B is AVHRR sensor 3B (3.7um mid-IR)
NOAA: Chan A is all sensor 3


NOAA-17 image from March 06, 2010 09:00 UTC (WXtoImg)

NOAA 17 has scan motor problems with rising motor currents.
Constant rephase by the MIRP is causing data dropouts on all the HRPT stream and APT and GAC derivatives. Auto re-phase will be disabled this week (cw 14) to study extent of problem and to allow a solution to be engineered if possible.

3 thoughts on “NOAA-17 problems”

  1. I notice an occasional perfect picture from Noaa 17, do the operators sometimes allow the motor current to rise as an experiment ?

  2. At present the engineers have it rigged so that on most passes a useful picture can be obtained using one channel

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