ARLA/CLUSTER: Equipamento de amador na 4M-LXS Lunar chinesa

[João Costa > CT1FBF]

4M-LXS Lunar ham radio payload

Beijing plans to launch a Lunar spacecraft on a journey lasting 196
hours that should take it around the Moon before returning and
re-entering the Earth's atmosphere. It will carry a 14 kg payload
known as 4M-LXS which was developed at LuxSpace. The launch is
expected to take place on October 23, 2014 at 1800 UT.

4M stands for Manfred Memorial Moon Mission in memory of Professor
Manfred Fuchs, founder and chairman of OHB group, Bremen who passed
away on April 27, 2014.

The 4M-LXS amateur radio payload will transmit on 145.980 MHz +/- 2.9
kHz (-40°C to +125°C), Doppler max: -2200 Hz, +1000 Hz.
The continuous transmissions will start 4670s (77.8 minutes) after
launch (-0, +600s). Five successive 1 minute sequences are sent during
the 5 minutes cycle. The digital mode JT65B will be used, this can be
decoded by radio amateurs using the free WJST software, there will
also be ‘human readable’ tone transmissions. See the transmit sequence
description on page 14 of 4M Mission: a Lunar FlyBy experiment.

During the lunar flyby, the range will be 399,636 km at the most and
the distance to the Moon will be between 12,000 and 24,000 km
depending on the final injection vector. The transmitter produces 1.5
watts to a simple Monopole antenna which should give a Signal to Noise
ratio ( S/N) comparable to amateur moon bounce (EME) signals at the
Earth’s surface.

LuxSpace wish to encourage radio amateurs around the world to receive
the transmissions and send in data. There will be a number of
Experiments and Contests with prizes to the winners in each experiment
and category. Details are given on page 19 of 4M Mission: a Lunar
FlyBy experiment.

A Java client will be made available to automatically send the WSJT
ALL.TXT and the decoded.txt files to a central database.

Read the paper 4M Mission: a Lunar FlyBy experiment
https://ukamsat.files.wordpress.com/2014/09/lxs-4m-eme2014-a4-v3.pdf

EME 2014 slides: 4M, A Moon Flyby Mission
https://ukamsat.files.wordpress.com/2014/09/lxs-4m-eme2014.pdf

LuxSpace Sarl on Facebook
https://www.facebook.com/LuxSpaceSarl

Free WSJT Software
http://physics.princeton.edu/pulsar/K1JT/