Re: [amsat-bb] Fw: [ans] ANS-180 ECHO Prelaunch Update

["Don Woodward" <dbwoodw@xxxxxxxxxx>]

The checksum didn't work on your elements and the RANN, Inclination and
Epoch time were wrong.

Here's what I get now...

ECHO
1 99999U 99999B   04181.28143200  .00000000  00000-0  00000-0 1 00019
2 99999  98.2558 250.8905 0000113 275.4723 261.4170 14.40910000000008


Based on Lee's numbers ...

UTC Epoch    6/29/2004  06:45:15.06
Inc                  98.25582
RAAN            250.8905
Ecc                 .00001139
MA                261.417
Arg Per          275.47233
MM               14.4091


73's

Don Woodward
KD4APP
AMSAT 33535
http://kd4app.webhop.org


----- Original Message ----- 
From: "Ken Ernandes" <n2wwd@mindspring.com>
To: "Don Woodward" <dbwoodw@alltel.net>; <amsat-bb@AMSAT.Org>
Sent: Monday, June 28, 2004 18:53
Subject: RE: [amsat-bb] Fw: [ans] ANS-180 ECHO Prelaunch Update


Based on the provided parameters, I compute the following TLE:

AMSAT ECHO
1 99999U          04181.28142431  .00000000  00000-0 +46367-8 0 00011
2 99999 098.2611 250.8899 0012045 291.5617 245.3334 14.42768316000013

73, Ken N2WWD


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On Behalf Of
Don Woodward
Sent: Monday, June 28, 2004 5:37 PM
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] Fw: [ans] ANS-180 ECHO Prelaunch Update

----- Original Message -----
From: "Don Woodward"
To: "Lee"; "ANS"
Sent: Monday, June 28, 2004 15:52
Subject: Re: [ans] ANS-180 ECHO Prelaunch Update


I couldn't get the Argument of Perigee below to work I but changed the other
factors from the initial TLE's and got...

ECHO
1 99999U 99999B   04181.27100000  .00000000  00000-0  00000-0 1 00019
2 99999  98.2558 250.8905 0072000 180.0000 261.4170 14.40910000000001

Looks like a 1502 UTC pass for me in Atlanta on orbit 5.

ECHO2 position on Tuesday, June 29, 2004 (UTC)  from Ball Ground
Time      AZ      EL    Range     Height   SSP Lat  SSP Lon  MA Squint Orbit
Sun
01:20:00  59.4Š +2.7Š   3015.4   792.7 1    43.4ŠN  54.7ŠW  158  0.0Š   -2
Sun
03:00:00  20.7Š +29.3Š  1419.1   792.6 1    43.4ŠN  79.7ŠW  158  0.0Š   -1
Visible
04:40:00 306.5Š +11.2Š  2281.3   792.4 1    43.4ŠN 104.7ŠW  159  0.0Š    0
Visible
15:10:00 114.6Š +16.1Š  1802.0   709.5 1    27.4ŠN  70.0ŠW  237  0.0Š    5
Sun
16:50:00 235.9Š +22.6Š  1501.4   709.4 1    27.4ŠN  95.0ŠW  237  0.0Š    6
Sun


73's

Don Woodward
KD4APP
AMSAT 33535
http://kd4app.webhop.org


----- Original Message -----
From: "Lee"
To: "ANS"
Sent: Monday, June 28, 2004 06:51
Subject: [ans] ANS-180 ECHO Prelaunch Update


SB SAT @ AMSAT $ANS-180.01
ECHO Prelaunch Update

AMSAT News Service Bulletin 180.01 From AMSAT HQ
SILVER SPRING, MD. June 28, 2004
To All RADIO AMATEURS
BID: $ANS-180.01

Below are the prelaunch elements for Echo, based on the predicted launch on
29 June.  The launch site is the Baikonur Cosmodrome in Kazakhstan.  The
Epoch time is based on the Dnepr's Orbit Insertion Time.

UTC Epoch    6/29/2004  06:45:15.06
Inc                  98.25582
RAAN            250.8905
Ecc                 .00001139
MA                261.417
Arg Per          275.47233
MM               14.4091


Echo First Communication Events

Plans call for Command Stations to begin working Echo with the morning
passes over the US on 29 June.  The first communication attempt with
Echo will be on the pass over the eastern US, at approximately 1452 UTC,
continuing with the next two passes over the US as well.  The transmitter on
Echo will not be turned on for a complete orbit until it is established that
the bird is operating normally and that the power system is working
properly.  The transmitter will be shut off before the end of the pass
window over the US.  Transmission may also be intermittent over the US as we
work with the Satellite.  The hope is to leave the TX0 transmitter on for
complete orbits starting as early as 0200 UTC on 30 June.

The callsigns for Echo's Pacsat Broadcast Protocol Digital system are:

Broadcast:  PCAB-11
BBS:          PCAB-12


Telemetry Submission Email Address

Until the ECHO Telemetry archive system is up and running please submit your
CSV telemetry files received with TlmEcho to the following email address.

ke4azn@amsat.org

Once the archive system is up and running details will be published on how
to submit and also download telemetry from Echo.

Check ANS for future bulletins as we progress with commissioning of Echo.

[ANS thanks Mike, KE4AZN for the above information]

/EX

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