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New DESCW version for Windows 95

07 July 1997

ERS User Services and Eurimage are pleased to announce the new release of DESCW. This new version is fully compatible with Windows 3.1 systems. Moreover many more features are available. Please also note the new ftp address.

Fresh processing to be applied to all ERS-1 & 2 SAR data

03 July 1997

In order to avoid problems of incompatibility between products generated before and after the introduction of the recent SAR processing chain, and more generally along time, ESA will interrupt the supply of ERS-1 and 2 already processed products currently held in its archive and remove this item from the pricelist and from its catalogues (e.g. from DESCW). As a consequence production of already acquired data will have to go through the same current processing chain as any newly acquired data. This measure will enter into force on September 1st, 1997.

New narrower swath size operations for GOME

25 June 1997

A new GOME narrow swath operation timeline (already tested on 14 June) has been executed nominally on 24th June 1997. It will be activated thereafter on every day 4, 14 and 24 of each calendar month. Activation of the new mode will start each time at the orbit following the sun observation timeline and will last one day up to the next sun observation. The new timeline is equivalent to the nominal timeline mode and will replace it for a day. The only difference will reside in the swath size which will be 240 km, instead of the normal 960 km swath (improved resolution). Please note that the North and South Pole timelines will not be used until further notice.

ERS-1 Altimeter USO drift correction update

24 June 1997

On June 25th 1997, the ERS-1 USO file correction will be modified as to compensate for a 10.3 mm bias that were already applied to the altimetric range of data acquired between 14-10-1991 through 20-03-1995. Products concerned are the Altimeter URA FD (Fast Delivery data) and QLOPR (Quick Look Ocean PRoduct).
This correction makes the USO (Ultra Stable Oscillator) file now consistent with all clock period corrections used in the Low Rate Data Processing Facility (LRDPF).

ERS-2 manoeuvre

23 June 1997

The next ERS-2 orbit maintenance manoeuvre is scheduled for the night between June 30th and July 1st 1997. It will be a one burn FCM manoeuvre. Present preliminary planning is to make a Delta-V of 6.4 mm/s at 1:11 Z.

SAR wave mode: imminent data processor change

23 June 1997

The ERS-2 Low Rate Data Processing Facility (LRDPF) has been enhanced as to include the processing of the SAR wave data as from 25th June 1997. The algorithm remains unchanged. The switch will apply to the first Kiruna orbit followed by Maspalomas and Gatineau stations late on the same day.

Wind Scatterometer sigma-nought

18 June 1997

This new table compensates for the 0.2 dB increase of the sigma-nought observed after the switch to the redundant Calibration Subsystem on 6 August 1996.

Calibration Pulse Level Look-up Table Modified as from 18/6/97

16 June 1997

Due to a difference between the Calibration Subsystem DC/DC converter A and B on ERS-2, a new compensatory Look-Up-Table for the ERS-2 Scatterometer will be installed in all stations starting with the first orbit of Kiruna on Wednesday 18 June 1997.

ERS-2 has been moved in order to keep a nominal "ERS-1 and 2" satellites position

10 June 1997

ERS-2 has been moved in order to keep a nominal "ERS-1 and 2" satellites position.

Online product catalogue

02 June 1997

Opening of the first services from the new ESA Multimission RS Product Catalogue.

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