Page 1ENVISAT Validation Workshop, 9 – 13 Dec 02, ESRIN

Status of AATSR Land Surface Temperature Development

Hannah Tait

AATSR System Analysis Engineer (EOP-PPP)

ESA ESTEC

Keplerlaan 1, PO Box 299, Noordwijk, NL

Hannah.Tait@esa.int

Page 2ENVISAT Validation Workshop, 9 – 13 Dec 02, ESRIN

Background

2000: LST retrieval algorithm proposed by Fred Prata (CSIRO) and discussed by the SAG.

2001: ESA propose to support the prototyping of the algorithm within the PP (as part of the AATSR ESL contract).

May 2002: PP implementation undergoes Acceptance Tests. July 2002: Fred Prata visits RAL. September 2002: LST Validation Team Meeting – Valencia. October 2002: Start of provision of L1b scenes over validation

sites to RAL for processing into prototype product.

Page 3ENVISAT Validation Workshop, 9 – 13 Dec 02, ESRIN

Current Status

Products containing the prototype retrieval are now being supplied to the Validation Team by RAL via FTP.

L1b data have been supplied to RAL for:• Thangoo, Amburla, Hay, Dunhuang & Sonora (1 Sept to 23 Nov)• Selected overpasses over Borneo (1 Sept to 23 Nov)• Spain and Kamchatka (Nov)• Sahara and Siberia (1 Sept to 23 Nov)

Data over volunteer sites to be ordered next. No validation results reported yet.

Page 4ENVISAT Validation Workshop, 9 – 13 Dec 02, ESRIN

Future Plans

Continue initial evaluation activities until Feb 03. In parallel, start implementation of LST in the OP in Jan 03. Convene a dedicated LST review meeting at the end of Feb 03. If the results are good:

• Offer the new retrieval to users ASAP (March/April 03).

If problems are identified:• For minor problems, open in March/April, but with a health-warning;• Correct the PP and OP in parallel and offer the product ASAP afterwards;• Stop work on the OP until the problems are resolved.

Once the retrieval becomes part of an official ENVISAT product, validation will continue within the framework of routine product quality monitoring.