Folks,
Any idea on what kind of TX power is being used for the weather satellites?
Thanks.
73,
Ed
KC9GWK Grid EN52
AmSat Member
Hello ED and al
Any idea on what kind of TX power is being used for the weather satellites?
In case of NOAA POES - APT trasmision:
" ...The signal itself is a 256-level amplitude modulatedhttp://en.wikipedia.org/wiki/Amplitude_modulated2400 Hz http://en.wikipedia.org/wiki/Hz subcarrierhttp://en.wikipedia.org/wiki/Subcarrier, which is then frequency modulatedhttp://en.wikipedia.org/wiki/Frequency_modulatedonto the 137MHz-band RF carrier http://en.wikipedia.org/wiki/Carrier_wave. Maximum subcarrier modulation is 87% (±5%), and overall RF bandwidth is 34KHz. On NOAA POES vehicles, the signal is broadcast at approximately 40dBmhttp://en.wikipedia.org/wiki/DBm(10 watts) effective radiated power http://en.wikipedia.org/wiki/Effective_radiated_power."
Source: http://en.wikipedia.org/wiki/Automatic_Picture_Transmission
Vy! 73 de Artur SP5QA
"End of life" transmitter power is 5 Watts....
http://www2.ncdc.noaa.gov/docs/klm/html/c4/sec4-2.htm
On Wed, Jun 11, 2008 at 8:59 PM, Ed Tump ed@squaretfarm.com wrote:
Any idea on what kind of TX power is being used for the weather satellites?
participants (3)
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Artur
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Dave hartzell
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Ed Tump