From: Dr. H. Paul Shuch (n6tx@setileague.org)
Date: Mon Mar 04 2002 - 11:10:39 PST
At 08:29 AM 3/4/02 -0800, James Brown wrote:
>Paul - Do you know the downlink frequency? I would like to point my system
>at it just for grins...
Here are all the specs I have, Jim, from two NASA documents. They are
about a year old, but still probably valid.
Antenna Diameter: 2.74 m
Antenna f/d: 0.4
Antenna Feed: Cross-dipole, prime focus
Antenna Polarization: RHCP from feed, LHCP from dish
Antenna Gain (@ HPBW): ~ 33 dBi
Transmitter Frequency: 2320 MHz
TWTA RF Output Power: 9 W at launch, probably 8 W today (39.0 dBm).
Exciter Output power: 50 mW (-13 dBm)
The approximate distance from Earth is 77.16 AU (1.152x10^13 m)
Free space path loss = -301.0 dB
P10 EIRP = 73.6 dBm (note: EIRP based on 65% illumination efficiency).
Rx Isotropic power = -227.4 dBm
In short, this will be such a weak signal as to be undetectable with
anything less than an Arecibo!
73, Paul
--------------------------------
H. Paul Shuch, Ph.D., CFII, FBIS
Executive Director, The SETI League, Inc.
433 Liberty Street, PO Box 555
Little Ferry NJ 07643 USA
voice (201) 641-1770; fax (201) 641-1771
n6tx@setileague.org www.setileague.org
Project Argus station FN11LH
"We Know We're Not Alone!"
This archive was generated by hypermail 2.1.2 : Mon Mar 04 2002 - 11:19:04 PST