[aprssig] New APRS satellite: LAPAN-A2

Robert Bruninga bruninga at usna.edu
Mon Sep 28 21:49:17 CDT 2015


This is just one of several new Chinese Ham sats and many of them have low
inclination orbits.  Meaning if you live near the equator you get a pass
every 90 minutes ALL DAY AND NIGHT LONG.

This should make APRS ideal for sailors and boaters.  These satelltes also
have FM voice and so it should be fun in the carribean   You cant see them
north of about 30 degrees latitude.

It also suggests we need to make sure we ahve plenty of IGates round the
world near the equator.

Bob
Wb4APR
---------- Forwarded message ----------
From: Andrew Glasbrenner <glasbrenner at mindspring.com>
Date: Mon, Sep 28, 2015 at 8:03 PM
Subject: [amsat-bb] LAPAN-A2
To: AMSAT-BB <amsat-bb at amsat.org>


I see Celestrak now has objects 2015-052A, B, C, D, and H in the tle-new.txt
file. These are all roughly the same altitude and 6 degrees inclination. One
is out in front of the others significantly. Probably pretty easy to look at
the RCS and figure which is LAPAN-A2, as it is fairly big compared to the
other secondary payloads.



For my location at ~28.3N, I see about 5 passes a day, clumped together in a
row, with max elevations of 3-4 degrees, and max length of ~7-8 minutes. I
think if you are north of 30 degrees, you will be out of luck on this one.



When the APRS digi is activated, I will plan on a gateway with a good
performing low elevation antenna. This could become an important resource to
boaters and such in the Caribbean, especially with the high revisit rate. It
will be quite the boon for the low latitude ops who don't get the same
number and quality of passes from polar orbiters as those north of the
tropics!



73, Drew KO4MA



2015-052A

1 40930U 15052A   15271.78805001  .00000636  00000-0  00000+0 0  9998

2 40930   5.9961  25.6324 0012569   1.1177  71.2694 14.76109362    97

2015-052B

1 40931U 15052B   15271.78630001  .00000639  00000-0  00000+0 0  9998

2 40931   5.9992  25.6568 0013796   3.6374  59.9065 14.76340487    80

2015-052C

1 40932U 15032C   15271.78522595  .00000640  00000-0  00000+0 0  9997

2 40932   6.0047  25.6912 0014433  12.5061  45.7809 14.76569231    87

2015-052D

1 40933U 15052D   15271.78414840  .00000641  00000-0  00000+0 0  9994

2 40933   6.0035  25.7250 0013915  10.3986  42.4641 14.76757899    84

2015-052H

1 40937U 15052H   15271.78277109  .00000675  00000-0  00000+0 0  9990

2 40937   5.9541  25.2141 0029532  80.0353 332.8819 14.80192300    95

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