# Presentation: 833600

## METOP-AInstrument Status & Issues

- J. Philip Green
- January 11, 2006

## Metop-A StatusDecember 21, 2006

**	****	****Current****	**** ****	****         ****	****	**
_**Instruments**__**	**__**Status**__**	**__**                 Notes                             _                             **_
- AVHRR	On	In Measurement - Day/Night flight managed
- HIRS	On	In Measurement
- AMSU-A1	On	In Measurement – Cold View Determination
- AMSU-A2	On	In Measurement – Cold View Determination
- MHS	On	In Measurement - 	Yesterday: Fast Scan Anomaly
- IASI	On	Normal ops with processing enabled
- 			(DPC minor error counter increasing continuously)
- GOME	On	In Measurement - SIOV timelines
- ASCAT	On	In Measurement  - Cal over East site only
- GRAS	In Stand by Refuse	Anomaly being investigated
- SEM	On	In Measurement
- A-DCS	On	In Measurement - Anomaly being investigated
- 			Science Telemetry Corrupted
- SARR	On	In Measurement (A-Side)
- SARP	On	In Measurement

## Issues & Resolution Activities

- NOAA Level 1B with Navigation Yaw Steering
- s/w Implemented
- Evaluation to follow
- NOAA Level 1B corrupted header information
- Long term tests underway to confirm fixes
- Data dropout
- EUMETSAT experiences some dropouts
- Ground system “features” learning curve
- Lost of data between consecutive orbits – workaround implemented
- Recent lost of two orbits of data – Ground configuration setup – corrected
- Ground system upgrades underway
- EUMETSAT & NOAA orbital statistics comparison underway
- Overlap data dropped between two consecutive passes
- Possible dropped data within the an orbit

## Issues & Resolution Activities (Cont.)

- EUMETSAT AVHRR geo-location findings
- Resolved with Workaround
- Processing parameter changes
- Reducing the AVHRR field of view to 55.20o
- Introducing a pitch correction term of 0.116833o
- Introducing a roll correction term of -0.125478o
- Introducing a yaw correction term of -0.033805o
- Geo-location accuracy of the order of 1 AVHRR pixel
- Change effective 10:00UTC on Dec 21, 2006

## Issues & Resolution Activities (Cont.)

- LRPT anomaly
- LRPT failure – likely cause is a short in the +10V circuit
- 15 Jan:  LRPT Side B switch-on (orbit 1247)
- 15 Jan:  HRPT switch-on (orbit 1248)
- MHS Fast Scan Anomaly - Resolved
- Instrument returned to nominal Ops today in orbit 891

## Issues & Resolution Activities (Cont.)

- IASI Anomalies
- Algorithm errors detection – Status ?
- Detection failed on very cool atmosphere views
- Error condition will never lead to a mode transition
- Problem understood & s/w patches implemented
- Single I/F errors detected – No Issue
- IASI DPC Minor Error Counter
- Identified prior to holidays
- Recovery action to starts early January
- Resolution activity includes:
- Reset NIU DPC
- ~1⁄2 day NOAA instrument data next week
- S/W patch to correct the problem – Implementation ?

## Issues & Resolution Activities (Cont.)

- A-DCS
- Possible processor failure
- IASI & GOME
- Generating >2000 anomalies / day – (onboard limits changes recommend)
- GRAS autonomously entered Standby Refuse mode on Monday
- AR have been raised

## Level 1b / 1c data

- AVHRR, HIRS, AMSU, MHS:
-  Level 1 are enabled
- Operational level data available
- IASI:
- SIOV TRB – January 18
- Level 1c dissemination on a pre-operational basis expected by the end of January (Subject to no anomalies)
- ASCAT:
- Level 1 data good enough for early release for 24 January (firm)
- GOME:
- SIOV TRB: moved to January 23
- Level 1 TBD – subject to data stability