NWP SAF status report on DRARS (part 1) - · The following stations need to apply updates to the...

© Crown copyright Met Office

NWP SAF status report on DRARS (part 1) Nigel Atkinson (Met Office, UK)

DRARS Coordination Group, Geneva, March 2015


Contents • Status of AAPP

• Monitoring of RARS ATOVS

Note new NWPSAF web site: www.nwpsaf.eu

http://www.nwpsaf.eu/

AAPP status

• Recent AAPP releases and changes relevant to RARS v7.9, 23rd Feb 2015 - Metop-B AMSU channel 5 v7.8, 5th Dec 2014 - Metop-A AMSU channel 8 v7.7, 27th August 2014 - NOAA-15 AMSU-A antenna position V7.6, 24th Feb 2014 - NOAA-15 and Metop-A calibration OPS-LRS v7-0, 13th Sept 2013 – current version of the IASI processor

• Plus other changes not related to RARS

• Important that RARS stations keep up to date New releases are announced:

By email to registered AAPP users

Via the AAPP forum http://www.nwpsaf.eu/forum/

Recommended that all RARS members subscribe to the Forum © Crown copyright Met Office

http://www.nwpsaf.eu/forum/

Monitoring of RARS ATOVS

• We compare each pass with the equivalent global data from NOAA or EUMETSAT

• Two methods of reporting: 1. Emails to station operators – daily summary and

passes with warnings 2. NWPSAF monitoring web page



We monitor “level 1d” – so if one AMSU channel is missing then all are reported as missing


Example of a pass with warnings in the AMSU window channels When this happens, recommended to check the navigation difference – OK in this case.

Daily summary – passes and warnings


Asia Pacific

Daily summary (cont.) Asia Pacific


South America and EARS

Daily summary - timeliness


Satellites

• NOAA-15 – very few stations receiving it, due to poor signal strength. Only the NOAA/EARS stations with large dishes. 17:30 E.C.T

• NOAA-16 and 17 – decommissioned

• NOAA-18 – good. Drifting into late afternoon orbit, close to NOAA-15. 17:00 E.C.T.

• NOAA-19 – good. 14:00 E.C.T.

• Metop-A – limitations on the AHRPT service. Same orbital plane as Metop-B.

• Metop-B – good. 21:30 E.C.T.


Equator crossing times


Metop

N15

N19

FY3C

S-NPP

N18

Global ATOVS timeliness


Metop-B Svalbard + McMurdo

Metop-A Svalbard only

NOAA-19 Wallops/Fairbanks/Svalbard

NOAA-18 Blind orbits

These are not currently on the SAF web site, but could be added

1 month stats

Observations on stations

The following stations need to apply updates to the AMSU calibration files. Upgrading to latest version of AAPP is recommended:

• Singapore NOAA-18: AMSU 8 missing NOAA-19: AMSU 1 and 8 missing No direct contact with the station

• Hong Kong NOAA-18: AMSU 8 missing

• Chile NOAA-19: AMSU 1 and 8 missing CONAE have this in hand

Note: there have been some issues with instability in NOAA-18 AMSU channel 9, which cause monitoring warnings. Currently stable.


Recently added stations

• Tahiti Good performance We are receiving via GTS

• New Delhi and Chennai Timeliness is very poor for the data we have received in the

past from New Delhi via GTS.

e.g. Best 79min, worst 228min in the example earlier

None from Chennai, but may be an issue with GTS routing. We are trying to get this resolved.


NWP SAF status report on DRARS (part 1) - · The following stations need to apply updates to the...

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