From: Andy Calloway [Andy.Calloway@gsfc.nasa.gov]
Sent: Monday, October 04, 1999 11:30 AM
To: csylvis@pop500.gsfc.nasa.gov; mhilliar@pop500.gsfc.nasa.gov;
steve.goodman@msfc.nasa.gov; john.hall@msfc.nasa.gov;
helpdesk@tsdis02.nascom.nasa.gov; kaku@eoc.nasda.go.jp;
hanada@eoc.nasda.go.jp; hanaoka@eoc.nasda.go.jp;
furuhata@hato.restec.or.jp; orderdesk@nsaeoc.eoc.nasda.go.jp;
ddsops@nsaeoc.eoc.nasda.go.jp; trmm-dps@hato.restec.or.jp;
kris.naylor@csc.com; rstrang@cscmail.csc.com;
emacie@pop500.gsfc.nasa.gov; kummerow@audry.gsfc.nasa.gov;
Hugh.Christian@msfc.nasa.gov; Roger.Chassay@msfc.nasa.gov;
William.L.Barnes.1@gsfc.nasa.gov; lyu@priam.gsfc.nasa.gov;
dnewlon@tsdis02.nascom.nasa.gov; socc@tsdis02.nascom.nasa.gov;
bilanow@tsdis01.nascom.nasa.gov; jcshiue@priam.gsfc.nasa.gov;
trmm-dps@hato.restec.or.jp; Kojima.Masahiro@nasda.go.jp;
Oikawa.Kouki@nasda.go.jp; Erich.F.Stocker.1@gsfc.nasa.gov;
GrasseJ@thorin.atsc.allied.com; BakerJ1@thorin.atsc.allied.com
Cc: EWeidner@pop500.gsfc.nasa.gov; CShoemak@pop500.gsfc.nasa.gov;
jkowalsk@pop500.gsfc.nasa.gov; dpalya@pop500.gsfc.nasa.gov;
AKludze@pop500.gsfc.nasa.gov; mtwilson@pop500.gsfc.nasa.gov;
rhicks@pop500.gsfc.nasa.gov; sharding@pop500.gsfc.nasa.gov;
mfiorava@pop400.gsfc.nasa.gov; lkurzmil@pop500.gsfc.nasa.gov;
rwiley@pop400.gsfc.nasa.gov; wwaro@pop400.gsfc.nasa.gov;
dsepan@pop400.gsfc.nasa.gov; nberhan@pop400.gsfc.nasa.gov
Subject: TRMM Recorder Data

To all concerned...

Late Sunday night, the TRMM MOC experienced severe degradation of the
Q-channel science data during the 277/02:44 event which resulted in
significant downlinked data gaps (TTR #21424).  The cause of the
degradation (MI, H/W, lines, etc.) is being investigated.  The decision was
made not to release the data storage recorder memory until a MOC system
problem could be resolved (ER#135) and until an attempt could be made to
recover the incomplete data downlink.  Unfortunately, sufficient TDRS
coverage was not available to avoid a recorder overflow following the
lengthy period of time which had already elapsed since the previous nominal
event.  Below are the times that the recorders were overflowed and were not
collecting science data.  Please contact me via phone or e-mail if you have
any questions, and reference the TRMM Operations Weekly Report next week
for any status updates.

VR3 (LIS) 		03:50:01z - 04:53:53z  (01:03:52 of overflow)
VR4 (PR)  		03:52:15z - 04:53:48z  (01:01:33 of overflow)
VR5 (TMI) 	03:52:16z - 04:53:53z  (01:01:37 of overflow)
VR6 (VIRS)	03:52:21z - 04:53:53z  (01:01:32 of overflow)

Andy Calloway

_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
_/_/	E-Mail Address:        Andy.Calloway@gsfc.nasa.gov
_/_/	NASA  Goddard Space Flight Center     Greenbelt MD
_/_/	TRMM:  Tropical Rainfall Measuring Mission
_/_/	Spacecraft Systems Engineer   Flight Operations Team
_/_/	Phone:  Desk: (301) 614-5543  MOR: 286-0197
_/_/	Pager: (301) 708-8274  Fax: (301) 614-5266
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/