Looking at the latest re-entry plot, why does Instantrack show an altitude that is 10km below the official prediction? This is using an EPOC TLE of 26 November, Instantrack shows 239.5 km Avaerage altitude. What do other programs show?
http://www.ew.usna.edu/~bruninga/ande-ops.html
Bob
-----Original Message----- From: aprssig-bounces@lists.tapr.org [mailto:aprssig-bounces@lists.tapr.org] On Behalf Of Robert
Bruninga
Sent: Tuesday, November 27, 2007 1:09 PM To: aprssig@lists.tapr.org Subject: [aprssig] ANDE -APRS Re-Entry Campaign
ANDE-APRS Re-Entry Campaign:
The ANDE-MAA satellite (Nav Oscar - 61) will de-orbit in the next few weeks but is fully operational. We encourage
activity,
because while it is in use (2m packet up/down), then it is
awake
and sending telemetry. We want to capture the most telemetry
to
see if we can catch the thermal changes as re-entry
approaches.
Who can capture the last telemetry frame?
The most important telemetry is that which is fed live by
IGate
into the APRS-IS system. Because that is automatically logged and time stamped. You can verify your data got in by looking at the http://pcsat.aprs.org web page after each pass.
If you manually capture any packets, Please take special care
to
accurately LOG the TIME of any packets received especially in the final day prior to re-entry. See the contest page below
for
how to submit entries:
Here is the ANDE Operations web page. It has links to live telemetry too: http://www.ew.usna.edu/~bruninga/ande-ops.html
And this one is the CONTEST for data collection and operations sponsored by PA3GUO and DK3WN: http://www.ande-deorbit.com
Any APRS station that is also on the internet can contribute telemetry by simply QSY'ing their normal APRS rig receiver to 145.825 on that final day.
If you do not normally run APRS or an IGate, then you can
simply
download ALOGGER.EXE which is a full up IGate designed just
for
satelite gating without having to learn APRS. See Bill's web page: http://www.billdiaz.dynip.com/ASatLogger.htm
ANDE is coming over the northern latitudes in the afternoons
and
evenings local sun time, but this pattern moves earlier by 14 minutes per day. Just monitor 145.825 MHz.
Enjoy! Bob, WB4APR
aprssig mailing list aprssig@lists.tapr.org https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
Nova shows 238.7 km altitude at MA 54 for ANDE - time 27/2355. Kep set 681.
Ken, W7KKE
Predict shows an altitude of 244 km at 0707 Nov 28, with elset #682, and it seems to be losing altitude at the rate of 1 km every other minute...
By the way, is there any chance of getting a command station in western NA to put the satellite in high-rate telemetry mode and/or turn on the digitalker one of these passes?
-Joe, N8FQ
On Tue, 27 Nov 2007 15:57:25 -0800 "Ken Swaggart" k.swaggart@charter.net wrote:
Nova shows 238.7 km altitude at MA 54 for ANDE - time 27/2355. Kep set 681.
Ken, W7KKE
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
My Nova shows a maximum height of 239.2 km and minimum of 237.3 during the orbit.
Kenneth - N5VHO
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Bruninga Sent: Tuesday, November 27, 2007 4:49 PM To: bruninga@usna.edu; amsat-bb@amsat.org Subject: [amsat-bb] Instanttrack Altitude?
Looking at the latest re-entry plot, why does Instantrack show an altitude that is 10km below the official prediction? This is using an EPOC TLE of 26 November, Instantrack shows 239.5 km Avaerage altitude. What do other programs show?
http://www.ew.usna.edu/~bruninga/ande-ops.html
Bob
-----Original Message----- From: aprssig-bounces@lists.tapr.org [mailto:aprssig-bounces@lists.tapr.org] On Behalf Of Robert
Bruninga
Sent: Tuesday, November 27, 2007 1:09 PM To: aprssig@lists.tapr.org Subject: [aprssig] ANDE -APRS Re-Entry Campaign
ANDE-APRS Re-Entry Campaign:
The ANDE-MAA satellite (Nav Oscar - 61) will de-orbit in the next few weeks but is fully operational. We encourage
activity,
because while it is in use (2m packet up/down), then it is
awake
and sending telemetry. We want to capture the most telemetry
to
see if we can catch the thermal changes as re-entry
approaches.
Who can capture the last telemetry frame?
The most important telemetry is that which is fed live by
IGate
into the APRS-IS system. Because that is automatically logged and time stamped. You can verify your data got in by looking at the http://pcsat.aprs.org web page after each pass.
If you manually capture any packets, Please take special care
to
accurately LOG the TIME of any packets received especially in the final day prior to re-entry. See the contest page below
for
how to submit entries:
Here is the ANDE Operations web page. It has links to live telemetry too: http://www.ew.usna.edu/~bruninga/ande-ops.html
And this one is the CONTEST for data collection and operations sponsored by PA3GUO and DK3WN: http://www.ande-deorbit.com
Any APRS station that is also on the internet can contribute telemetry by simply QSY'ing their normal APRS rig receiver to 145.825 on that final day.
If you do not normally run APRS or an IGate, then you can
simply
download ALOGGER.EXE which is a full up IGate designed just
for
satelite gating without having to learn APRS. See Bill's web page: http://www.billdiaz.dynip.com/ASatLogger.htm
ANDE is coming over the northern latitudes in the afternoons
and
evenings local sun time, but this pattern moves earlier by 14 minutes per day. Just monitor 145.825 MHz.
Enjoy! Bob, WB4APR
aprssig mailing list aprssig@lists.tapr.org https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
Joe Veldhuis -
Ken Swaggart -
Ransom, Kenneth G. (JSC-OC)[BAR] -
Robert Bruninga