Iapetus rev 49 requests: ISS_049IA_ICYMAP003_UVIS

Update: 09 Aug 2007 (TD)

Start UTC: IA-01:44 h (2007-253T12:31:40)

Duration: 00:24 h

Alloc. data volume: 24 Mb. ISSPT: 23.8 Mb (3 NACs)

TelMode: S&ER-3

Attitude: ISS_NAC to Iapetus (NEG_X to Iapetus SC_RAM; offset (0,-30°,0))

Trigger: 2932

Spatial resolution (NAC) = 81 ... 76 m/pxl

Geometry:

    UTC             ALTITUDE  SC_LAT   SC_LON   Sun_LAT  Sun_LON  PHASE

2007 SEP 10 12:31:40   14106     9.2     74.8       1.4    214.1  137.8

2007 SEP 10 12:38:58   13092     9.1     75.5       1.4    214.1  137.2

2007 SEP 10 12:41:24   12754     9.1     75.7       1.4    214.1  136.9

2007 SEP 10 12:43:50   12417     9.1     76.0       1.4    214.1  136.7

2007 SEP 10 12:55:40   10781     9.0     77.6       1.4    214.2  135.3

Goals: - High-res. imaging of northern transtition zone (~35°...45°N)

Pointing (pdt issues):
- UVIS performs scan
- Tracking start: 12:38:50 UTC (= trigger start)
- Shutter times      => Frame start     => Shutter file
   12:38:58.475           12:38:50                 0:00
   12:41:24.475           12:41:20                 2:30
   12:43:50.475           12:43:46                 2:26

Exposures (ISSPT issues):
- Read-out from previous request (CASSREG) extends 77.008s into this request
   = 12:32:57.008 UTC
- Do 1x3 mid-latitudes mosaic (3 NAC shutters)
- Exp. times: NAC clr 180ms (12 bit, g=3)
- Smear: ~1000 pxl in ~3min => 5.5 pxl/sec => max. 'smear-poor" exp. time ~ 180ms :-(