Author Topic: Chang‘e-4 communications relay satellite, CZ-3B, XSLC - June 2018  (Read 2901 times)

Offline beidou

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The Chang'e 4 relay spacecraft is planned for launch in June 2018. It will travel to the Earth-Moon L2 point to enable communications with a farside lander to be launched later the same year.

It will be launched by a CZ-4C rocket.
« Last Edit: 01/12/2018 07:54 PM by beidou »

Offline plutogno

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from Chinaspaceflight on Twitter

Offline Phil Stooke

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https://www.chinaspaceflight.com/satellite/HIT/DSLWP-A1-A2.html

Looks like the relay satellite will be accompanied by two small satellites, doing a combination of radio astronomy and amateur radio outreach work - enthusiasts can download telemetry and images.  The relay satellite is at L2  but these are apparently in an elliptical lunar orbit.

Offline Steven Pietrobon

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I think the whole article is worth repeating here.

"DSLWP-A1/A2 Updated: 15 Nov 2016 

Supporting Organisation Harbin Institute of Technology 

Headline Details:

DSLWP is a lunar formation flying mission for low frequency radio astronomy, amateur radio and education, consists of 2 microsatellites. The amateur radio station onboard DSLWP-A1 will provide telecommand uplink and telemetry / digital image downlink. An open telecommand is also designed to allow amateurs to send commands to take and download an image.

They have a volume of about 50x50x40 cm3 and a mass of about 45 kg.

2 linear polarization antennas are mounted along and normal to the flight direction. The satellites are 3-axis stabilized. Proposing A1 downlinks on 435.425 MHz and 436.425 MHz and A2 downlinks on 435.400 MHz and 436.400 MHz using 10K0F1DCN or 10K0F1DEN with 250 bps GMSK with concatenated codes or JT65B.

Planning a launch into a 200 x 9000km lunar orbit in June 2018.

Further info at http://lilacsat.hit.edu.cn/ "
« Last Edit: 12/06/2016 03:00 AM by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online FutureSpaceTourist

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Interesting:

Quote
CGWIC‏ @CGWIC

China and Saudi Arabia to cooperate on lunar explore. MOU for Chang E-4 lunar mission was signed between CNSA and KACST on 16 Mar.

https://twitter.com/CGWIC/status/842704588327342085

Offline Star One

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New overview of this mission from UT in relation to its upcoming launch later this year.

https://www.universetoday.com/138197/upcoming-chinese-lander-will-carry-insects-plants-surface-moon/

Online Skyrocket

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New overview of this mission from UT in relation to its upcoming launch later this year.

https://www.universetoday.com/138197/upcoming-chinese-lander-will-carry-insects-plants-surface-moon/

This article tells about "a relay orbiter being launched aboard a Long March 5 rocket in June of 2018." The "Long March 5" part is apparently a mistake.

Online Phillip Clark

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New overview of this mission from UT in relation to its upcoming launch later this year.
https://www.universetoday.com/138197/upcoming-chinese-lander-will-carry-insects-plants-surface-moon/
This article tells about "a relay orbiter being launched aboard a Long March 5 rocket in June of 2018." The "Long March 5" part is apparently a mistake.

It is this kind of stupid mistake that makes me doubt anything in the article that I cannot confirm from Chinese sources.
I've always been crazy but it's kept me from going insane - WJ.

Offline Star One

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New overview of this mission from UT in relation to its upcoming launch later this year.
https://www.universetoday.com/138197/upcoming-chinese-lander-will-carry-insects-plants-surface-moon/
This article tells about "a relay orbiter being launched aboard a Long March 5 rocket in June of 2018." The "Long March 5" part is apparently a mistake.

It is this kind of stupid mistake that makes me doubt anything in the article that I cannot confirm from Chinese sources.

It appears to be quoting from at least one Chinese source as it has a link to it within the text.

Offline Phil Stooke

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The Long March 5 mistake (probably just a typo by a clumsy journalist) doesn't come from that Chinese source, though. 

Offline Star One

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The Long March 5 mistake (probably just a typo by a clumsy journalist) doesn't come from that Chinese source, though.

I know I was just pointing out that at least some of the contents of the article appear to be sourced from Chinese publications.
« Last Edit: 01/06/2018 06:19 PM by Star One »

Offline beidou

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According to information disclosed here, the launch vehicle will be CZ-3B.

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预计今年年底,“嫦娥四号”探测器将搭乘长三乙火箭飞天

Online Phillip Clark

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According to information disclosed here, the launch vehicle will be CZ-3B.
Quote
预计今年年底,“嫦娥四号”探测器将搭乘长三乙火箭飞天

Perhaps the lunar relay satellite launch is being confused with the launch vehicle for the CE4 mission itself?

The relay satellite is quite light, so it would fit with a CZ-4C launch.
I've always been crazy but it's kept me from going insane - WJ.

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