Author Topic: SpaceX F9 : RCM RADARSAT Constellation : Vandenberg : NET November 2018  (Read 20399 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

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.

Online gongora

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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

Offline 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...

Offline 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.


Online gongora

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I hope that 3MT includes the container...

Tweet from RUAGSpace:
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Over 3 metric tons rolled away from our #Linköping facility,
carrying the heaviest piece of hardware ever developed there. Container held a major structure for a dispenser that will launch three spacecrafts simultaneously this year. Safe travels to sunny @California #HeavyLoad

(I'm guessing this is for RCM)

Offline sewebster

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(I'm guessing this is for RCM)

It says "RCM Dispenser" on the container, so I think you are correct!

Looks like it's 1400 kg per spacecraft plus the dispenser.  I'm guessing that means this mission will lift probably between 6200 and 8200 kg (depending on how much of that 3 metric tons is the payload adapter).

Offline Freddedonna

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Pretty cool video posted by the CSA about the Radarsat integration process, filmed inside the MDA factory :
« Last Edit: 05/10/2018 11:25 AM by Freddedonna »

Online eriblo

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Attended a presentation by Daniel De Lisle (CSA) on June 6 where he stated that the current "focus date" for launch is November 7th, one week into the contracted one month launch period. Should be able to at least say NET November.

Online gongora

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This news report says late November.

https://globalnews.ca/video/4290161/spacex-launches-canadian-surveillance-satellites

I'm not really believing that all of the SpaceX Vandenberg payloads saying they'll launch this year are actually going to launch this year.  It will be interesting to see if SpaceX can step up their West Coast launch rate.

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