[amsat-bb] Mode of AO-51 for

["Thailand Amateur Radio Satellites Corporate" <tamsat_gateway@xxxxxxxxxxx>]

Very Urgent !!


Dear KE4AZN  AO-51 Echo Satellite Command Station

During 28 December 2005 – 3 January 2006, Thailand would be the host of 
“25th Asia Pacific Scout Jamboree 2005” at Had Tao, Sattahip, Chonburi (see 
more information at http://www.aprjam25.org/) The Thailand Amateur Radio 
Satellites Corporate (TAMSAT) has an opportunity to join this event as 
helping scouts to use Portable HAM Radio Station E25AJ connecting via Low 
Earth Orbit Satellites (LEO).  As we found, at the present, Low Earth Orbit 
Satellites with excellent efficiency is only AO-51 that is belong to yours.  
The efficiency would be best when using in High Power Mode as we can found 
from 22 Oct 2005 14:10 UTC E20QVD connecting with 9W2QC HAM of Malaysia with 
1 Watt RF power .

Therefore, as we found the AO-51 Schedule that announced on 
http://www.amsat.org/amsat-new/echo/ControlTeam.php says that after 19 Dec 
2005 the mode of working will be FM Repeater, V/U and 9k6 Digital, V/U, PBP 
BBS.  Since the record of communication via AO-51 satellite in Thailand, 
including the announcement of frequency usage from NTC that allows to 
receive at 435 – 437 MHz UHF frequency band only, cannot transmit and the 
Transceiver that can set the PL Tone in Thailand are very few, we used to 
communicate with this satellite by receiving through Satellites Gateway 
Station that use the signal received from Transceiver through UHF to VHF 
Downconvertor to let the signal out by VOIP Echolink program at Conference 
HS0AC or CHANG room, then HAM of Thailand received the signal from Link that 
connected in Conference to on air in many parts of Thailand.  Therefore, 
with these loads of problem, TAMSAT Group would like to ask you that 
controlling AO-51 for your help by changing mode of AO-51 Satellites to be 
FM Repeater, V/U High Power Mode and No PL Tone or mode during 28 Dec 05 to 
3 Jan 06 as followed :-

28 Dec 2005 - 3 Jan 2006
FM Repeater, V/U High Power Mode
Uplink: 145.920 mhz FM, No PL Tone
Downlink 435.300 mhz FM


Your kindly help would be very appreciated and most helpful for this event.  
Thank you very much in advance.


Best Regards,


Tanan Rangseeprom HS1JAN
Little Huston - Space Operations of E25AJ Team
e-mail : hs1jan@tamsat.org
http://jamboree.siamportals.com

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