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CX2SA > SATDIG 28.10.12 20:02l 239 Lines 6915 Bytes #999 (0) @ WW
BID : AMSATBB7361
Read: GUEST
Subj: AMSAT-BB-digest V7 361
Path: IZ3LSV<IV3YXW<HB9TVW<DB0ANF<CX2SA
Sent: 121028/1902Z @:CX2SA.SAL.URY.SA #:3720 [Salto] FBB7.00e $:AMSATBB7361
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Orbitron help please (Gus 8P6SM)
2. Re: Orbitron help please (Paul Williamson)
3. Re: Polarization for ISS and Weather Satellites (Trevor .)
4. Five CubeSats altitude (Masahiro Arai)
5. Re: Five CubeSats altitude (Trevor .)
----------------------------------------------------------------------
Message: 1
Date: Sun, 28 Oct 2012 02:12:57 -0400
From: Gus 8P6SM <8p6sm@xxxx.xxx>
To: John Heath <g7hia@xxxxxxxxxx.xxx>
Cc: Amsat <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Orbitron help please
Message-ID: <508CCCE9.6060902@xxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On 10/27/2012 07:31 PM, John Heath wrote:
> Hi All,
> Just updated keps for noaa weather satellites from Celestrak and find the
the file contains mostltly birds that are no longer operational.
> How can I delete the unwanted birds.
Using GNU grep 2.5.4 on Linux:
grep -F -f wanted.sat -A 2 weather.txt > use_this.tle
The file 'wanted.sat' is a simple text file with a list of desired
satellites, one per line. Example (using amateur satellites):
----8<------------->8------
OSCAR 7
EYESAT-1
JAS-2
PCSAT
HAMSAT
----8<------------->8------
Grep picks any satellites that matches your listed names, and outputs
the name and the two-line data immediately following. It adds a
separator line between each, but I've never had a problem. AAMOF (and
correct me if I'm wrong) but the TLE format is specifically supposed to
ignore additional lines that don't conform to the TLE format.
Not running Linux? Start today! ;-)
Or, look for 'grep' for Windows here:
http://gnuwin32.sourceforge.net/packages/grep.htm
--
73, de Gus 8P6SM
The Easternmost Isle
------------------------------
Message: 2
Date: Sun, 28 Oct 2012 00:16:26 -0700
From: Paul Williamson <kb5mu@xxxxx.xxx>
To: George Henry <ka3hsw@xxx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>, John Heath <g7hia@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Orbitron help please
Message-ID: <F05AB036-A938-4656-B026-D688D5173D86@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
On Oct 27, 2012, at 9:03 PM, George Henry <ka3hsw@xxx.xxx> wrote:
> There used to be a program called NASAWASH that would allow you to clean
up a TLE file by specifying, in a text file, which birds you were interested
in, and then running the program against the new TLE file each time you
downloaded it. It would then output a TLE file containing only the sats you
specified. I think it was available for download from the AMSAT files area.
NASAWASH is still available at
http://www.amsat.org/amsat-new/tools/softwareArchive.php#pc-util or direct
from me at http://www.mustbeart.com/software/nasawash.html -- but it doesn't
have that feature. It cleans up a TLE file but can't select a subset of the
satellites.
There are a couple of other old DOS programs still available on the AMSAT
web site that do have the feature. Follow the link above and look for
EXTRACT or SORTNENG.
73 -Paul
kb5mu@xxxxx.xxx
------------------------------
Message: 3
Date: Sun, 28 Oct 2012 08:22:21 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Polarization for ISS and Weather Satellites
Message-ID:
<1351412541.90823.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Some guidance regarding Amateur use of circular polarization is given by
IARU Region 1 in the VHF Managers Handbook.
IARU-R1 recommend that "Looking into the direction of transmission, helical
beam aerials shall have a right-hand thread."
See page 122 - 8.8.5 IARU region 1 Technical Recommendation P.1 at
http://iaru-r1.org/index.php?option=com_remository&Itemid=173&func=startdown&i
d=428
73 Trevor M5AKA
------------------------------
Message: 4
Date: Sun, 28 Oct 2012 22:43:11 +0900
From: Masahiro Arai <m-arai@x.xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Five CubeSats altitude
Message-ID: <201210281343.AA00021@xxxxxx.x.xxxxx.xx.xx>
Content-Type: text/plain; charset=us-ascii
I'm ploting altitude of five CubeSats which were deployed from ISS.
The results is interesting. First deployment satellites are lower
altitude than laters. I guess this is related to initial velocity at
deployment.
First Deployment
deployment order: #1 WE WISH, #2 RAIKO
altitude: WE WISH < RAIKO
Second Deployment
deployment order: #1 TechEdSat, #2 F1, #3 FITSAT-1
altitude: TechEdSat < F1 < FITSAT-1
I'm also ploating ARISSat-1 on the same chart as its time line align
to the five CubeSats deployment date. The chart shows five CubeSats
have large decay rate than ARISSat-1.
You can see the chart on the following URL.
http://www.ne.jp/asahi/m-arai/gkz/5CubeSats_Altitude.png
73
Masa JN1GKZ Tokyo Japna
------------------------------
Message: 5
Date: Sun, 28 Oct 2012 14:06:32 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Five CubeSats altitude
Message-ID:
<1351433192.77846.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Interesting chart, it suggests rate of decay is size/mass dependent. RAIKO
which is a 2U CubeSat and was deployed 2nd is now higher than all the others.
73 Trevor M5AKA
--- On Sun, 28/10/12, Masahiro Arai <m-arai@x.xxxxx.xx.xx> wrote:
> From: Masahiro Arai <m-arai@x.xxxxx.xx.xx>
> Subject: [amsat-bb] Five CubeSats altitude
> To: amsat-bb@xxxxx.xxx
> Date: Sunday, 28 October, 2012, 13:43
>
> I'm ploting altitude of five CubeSats which were deployed
> from ISS.
> The results is interesting. First deployment satellites are
> lower
> altitude than laters. I guess this is related to initial
> velocity at
> deployment.
>
> First Deployment
> ? deployment order: #1 WE WISH, #2 RAIKO
> ? altitude: WE WISH < RAIKO
>
> Second Deployment
> ? deployment order: #1 TechEdSat,? #2 F1,? #3
> FITSAT-1
> ? altitude: TechEdSat < F1 < FITSAT-1
>
> I'm also ploating ARISSat-1 on the same chart as its time
> line align
> to the five CubeSats deployment date. The chart shows five
> CubeSats
> have large decay rate than ARISSat-1.
>
>
> You can see the chart on the following URL.
>
> http://www.ne.jp/asahi/m-arai/gkz/5CubeSats_Altitude.png
>
>
>
> 73
>
> Masa? JN1GKZ? ? ? Tokyo Japna
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx.
> Opinions expressed are those of the author.
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>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 7, Issue 361
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