| Date: | 2012-04-11 07:59:47 | |
| Sender: | Sherwood, Robert A. <rshe@nerc.ac.uk> | |
| Subject: | [SLR-Mail] No.2062: Re: [ilrs] URGENT MAIL - Envisat Major Anomaly | |
| Author: | Pierre F | |
| Content: | ******************************************************************************** SLR Electronic Mail 2012-04-12 12:49:04 UTC Message No. 2062 ******************************************************************************** Dear All, Hi, we tracked Envisat at Herstmonceux last night with only a small (-7ms) time bias. However the satellite did only give returns for the first half of the pass, no indication from the observer of any other problem, so could be an indication of incorrect orientation. Will send more info if we get it. Best regards, Rob ________________________________________ From: ilrs-bounces@lists.nasa.gov [ilrs-bounces@lists.nasa.gov] On Behalf Of Pierre.Femenias@esa.int [Pierre.Femenias@esa.int] Sent: 10 April 2012 09:55 To: SLRMail@dgfi.badw.de; ilrs@lists.nasa.gov Subject: [ilrs] URGENT MAIL - Envisat Major Anomaly Author: Pierre Féménias ESA ESRIN URGENT MAIL - Envisat Major Anomaly Dear all, Since Sunday 8 April 2012, at the Kiruna pass at 12:28UTC, Envisat is not transmitting any telemetry anymore. Only an un-modulated S-Band RF carrier was received on-ground. No X-Band and Ka-Band (via Artemis) data were received as from the same time. An extended network of ground stations was immediately activated to send commands to the satellite, but all attempts are unsuccessful so far. The S-band carrier which was initially still available disappeared after few hours. Can you please confirm if the Envisat satellite is visible from the different laser stations? Thanks for your prompt support. Kind regards, Pierre Féménias ESA - European Space Agency Pierre Féménias EOP-GMQ Sensor Performances, Products and Algorithms Office Earth Observation Ground Segment Department ESRIN Via Galileo Galilei Casella Postale 64 I-00044 Frascati, Italy Pierre.Femenias@esa.int | www.esa.int T +39 06 941 80674 | F +39 06 941 80612 This message and any attachments are intended for the use of the addressee or addressees only. The unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content is not permitted. If you received this message in error, please notify the sender and delete it from your system. Emails can be altered and their integrity cannot be guaranteed by the sender. Please consider the environment before printing this email.-- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system.******************************************************************************** |