| |
CX2SA > SAT 17.07.04 23:06l 43 Lines 1933 Bytes #999 (0) @ AMSAT
BID : ANS-199.04
Read: DO9ST DK7JAN DO4BMW GUEST
Subj: ECHO Progress Update - 18 July 2004
Path: DB0FHN<DB0THA<DB0ERF<DB0FBB<DB0GOS<DB0EEO<DB0RES<ON0AR<7M3TJZ<KP4IG<
EA5DVS<EA5AKC<CX2SA
Sent: 040717/2057Z @:CX2SA.LAV.URY.SA #:54343 [Minas] FBB7.00e $:ANS-199.04
From: CX2SA@CX2SA.LAV.URY.SA
To : SAT@AMSAT
AMSAT News Service Bulletin 199.04 From AMSAT HQ
SILVER SPRING, MD. July 18, 2004
To All RADIO AMATEURS
BID: $ANS-199.04
Some stations have noted the S testing and reported results, which is
appreciated by the command team. The command team has been watching the
temperature closely when the S Tx is on. Since it is only about 30 percent
efficient a lot of power must be dissipated in the transmitter and its
enclosure. So far the temperature rise, while quite noticeable, has not
been a problem.
AO-51 continues to spin and tumble at a relatively rapid rate. In one axis
it's about 15 seconds per rev. While these rates are high they are not a
problem for the satellite. They do create some fades on the downlink that
will go away once the tumble is damped out. Because of the high rates it is
likely to take a while for that stable mode to be achieved. The torq rod
has also not yet oriented the satellite to the earth's magnetic field.
A new section of the telemetry archive will be open soon with whole orbit
data that has been collected by the command stations. Some of it is at a
rate of 3 seconds between samples. That high sample rate data is what has
been being used to determine the spin and attitude. Once on-line that
section of the site will be available for anyone to download archived
telemetry.
http://coloradosatellite.com/echo
Approximately 2500 launch campaign pictures are now available for browsing
on the web thanks to Chuck Green, N0ADI. The pictures can be viewed at
http://bach.as.arizona.edu/gallery/echo
There has been some speculation about modes for future experimenter
Wednesday. While AO-51 is a very flexible and capable spacecraft, it is
still too early to determine exactly what the final operational parameters
will be on Wednesdays or during "normal" operations.
[ANS thanks Chuck, N0ADI and Jim, WD0E for the above information]
Read previous mail | Read next mail
| |
