25 May
2018
25 May
'18
1:53 p.m.
Jordan,
Yes, you should see a sudden change in the doppler curve. And that would be a welcome confirmation of a successful maneuver.
If you also can receive the LJ 1 S band downlink it would be extra interesting to see what happens to that signal.
73, Nico
On 25-05-18 15:47, Jordan Trewitt wrote:
If we have our S band antennas pointed up there, shouldn't we be able to see the braking maneuver with the Doppler shift? Assuming the moon (or Earth) doesn't block the signals. -Jordan KF5COQ
On Fri, May 25, 2018 at 8:22 AM Nico Janssen <hamsat@xs4all.nl mailto:hamsat@xs4all.nl> wrote:
The Chinese microsats LongJiang 1 & 2 have arrived at the Moon. On 2018-05-25 between 14:00 and 15:00 UTC they are expected to pass the Moon at a distance of about 300 km. At that time they should perform a braking maneuver so that they can enter a high elliptical 300 x 9000 km orbit around the Moon. The planned orbit inclination is unknown. Unfortunately there is virtually no information on these satellites coming from China. It is not clear if LJ 1 is recovered. Telemetry is being received from the S band downlink of LJ 2 at 2275.22 MHz. All other information, including recent orbital data, is missing. Note that the usual satellite tracking programs and regular TLE data can not be used for tracking satellites near the Moon. You really need specific deep space tracking software and orbital elements. TLE sets for the LongJiangs that were published earlier have no value at all now that these satellites are in the vicinity of the Moon. Again I would like to refer to my web page on this subject: https://hamsat1.home.xs4all.nl/index.html 73, Nico PA0DLO _______________________________________________ Sent via AMSAT-BB@amsat.org <mailto:AMSAT-BB@amsat.org>. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb