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VK2BOD > VK 20.02.15 13:55l 38 Lines 1300 Bytes #999 (0) @ WW
BID : 15950_CX2SA
Read: GUEST IU4JRU
Subj: narrow band signal reflected off moon on 3 March
Path: IZ3LSV<IW8PGT<I3XTY<I0OJJ<UA6ADV<7M3TJZ<JE7YGF<VE3UIL<ZL2BAU<CX2SA
Sent: 150220/1151Z @:CX2SA.SAL.URY.SOAM #:15950 [Salto] FBB7.00e $:15950_CX2SA
From: VK2BOD@CX2SA.SAL.URY.SOAM
To : VK-VHF@WW
There will be a narrow band signal at about 2041 MHz illuminating a spot
on the moon (probably centered on Tycho) about 1000km in diameter early
in the morning of 3 March. From about 0630 to 0900 UTC. JPL will be
transmitting about 20kW from a 34 m aperture. We'll probably have 3
distinct transmit modes, 2 CW carrier, and a third where there's a PN
ranging code on the signal, probably changing every 45 minutes.
The signal should be easy to detect with even a small receive antenna,
at least the narrow band signal.
If you have a wideband recorder, the ranging code should be easy to
recover with post processing. Standard ranging code as defined in 810-005
http://deepspace.jpl.nasa.gov/dsndocs/810-005/214/214-1.pdf
as with all PN ranging that DSN does, the PN code rate is coherent to
the transmit carrier, probably 1.9931640625 MHz (or half that) in this case.
I'll find out more about the exact options on the ranging, and things
like the mod index.
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Posted by: Jim Lux <jimlux@xxxxxxxxx.xxx> <jimlux@xxxxxxxxx.xxx>
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