Author Topic: SpaceX F9 : RCM RADARSAT Constellation : Vandenberg : NET H2-2018  (Read 14245 times)

Online IanThePineapple

Tweet from Peter B. de Selding:
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Maxar @sslmda CEO Howard L. Lance to CNBC: All 3 Canadian govt Radarsat Constellation Mission sats (~ 475kg each) to launch on single previously flown @spacex Falcon 9 in 2018.

Wow, if they're that light and flying on a Block 4, it'll likely RTLS
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Online gongora

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Tweet from Peter B. de Selding:
Quote
Maxar @sslmda CEO Howard L. Lance to CNBC: All 3 Canadian govt Radarsat Constellation Mission sats (~ 475kg each) to launch on single previously flown @spacex Falcon 9 in 2018.

Wow, if they're that light and flying on a Block 4, it'll likely RTLS

Not likely to be Block 4 in the second half of 2018.

Online gongora

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This video shows the custom RUAG dispenser for the mission.


Offline Steven Pietrobon

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Screen grabs. The dispenser firsts tilts the satellites and then separates them. Ruag have had 100% success with their adaptors.
« Last Edit: 01/18/2018 07:01 AM by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Tweet from MDA_SatSystems:
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#MDA was delighted to host @SherryRomanado, @Gabriel_SMarie, and @MarjBoutinSweet at our #Montreal facility on 19-Jan to show off the @csa_asc #RADARSAT Constellation Mission satellites being built.

Offline rocket-chris

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I'm wondering a bit about the mass of the sats which is in some sources as well as in this Thread specified with ~475kg.

At the CSA website the "Total mass at launch" is given with 1602kg. And the sats are based on the Canadian SmallSat Bus which has a mass of 760kg only for the bus...

1602kg per sat would give around 4800kg for all three which make a F9 launch more logical than an F9 launch with a payload weight less than 1500kg in total.

http://www.asc-csa.gc.ca/pdf/eng/publications/radarsat-constellation-eng.pdf

https://directory.eoportal.org/web/eoportal/satellite-missions/r/rcm

Online sewebster

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I'm wondering a bit about the mass of the sats which is in some sources as well as in this Thread specified with ~475kg.

At the CSA website the "Total mass at launch" is given with 1602kg. And the sats are based on the Canadian SmallSat Bus which has a mass of 760kg only for the bus...

1602kg per sat would give around 4800kg for all three which make a F9 launch more logical than an F9 launch with a payload weight less than 1500kg in total.

http://www.asc-csa.gc.ca/pdf/eng/publications/radarsat-constellation-eng.pdf

https://directory.eoportal.org/web/eoportal/satellite-missions/r/rcm

It looks to me like the mass of each satellite is around 1400 kg. This is just based on web searches and trying to interpret various presentations etc. There is one very old CBC article that seems to suggest 1200 kg/sat more definitively (i.e., vs total launch mass for all three: http://www.cbc.ca/news/canada/mda-awarded-contract-to-design-satellite-fleet-1.721135). Most sources just list a mass without mentioning per sat or not... but generally they are comparing Radarsat 1, 2, and now RCM... seems most logical to me to compare the individual satellites, but hard to say really, because when comparing something like revisit time, they will often say daily, but that is for the constellation...

Online sewebster

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https://directory.eoportal.org/web/eoportal/satellite-missions/r/rcm

Just read this link more thoroughly, originally posted by rocket-chris. It seems rather specific that the mass is 1400 kg/spacecraft and also specifies the bus mass and payload mass separately, both of which mass more than the 475 kg figure that has also been mentioned. Search for "mass" on the page.


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