QuoteWhy would they only postpone Radarsat because of the risk of another hydraulic pump failure, but still launch Iridium (11 January), Nusantara Satu (planned for 22 February) and DM1 (planned for 2 March)?Because:Both Iridium and Nusantara Satu are ASDS-type landings. The hydraulic pump failure occurred on a RTLS-type mission, which has different flight profile and different landing profile. So, it is not unreasonable to suggest this failure mode does not apply to ASDS. Yes, this is speculation - un-grounded - just like your variant. We both do not know the necessary facts (and never will).In contrast, your last example, SpX-DM1, does not belong to the group for sure, because it's a high profile mission where the schedule - when set - does have very high priority. In other words, SpaceX will definitely prefer to risk the booster landing over another launch delay.It seems to me you still missing the point (or, likely, I did not do good job with explaining it):I am NOT trying to say my explanation is right, nor his explanation is wrong - no.Neither I am trying to say my explanation is better than his.I gave my variant just to show that his is not the only one.
Why would they only postpone Radarsat because of the risk of another hydraulic pump failure, but still launch Iridium (11 January), Nusantara Satu (planned for 22 February) and DM1 (planned for 2 March)?
Quote from: smoliarm on 02/18/2019 03:58 pmQuoteWhy would they only postpone Radarsat because of the risk of another hydraulic pump failure, but still launch Iridium (11 January), Nusantara Satu (planned for 22 February) and DM1 (planned for 2 March)?Because:Both Iridium and Nusantara Satu are ASDS-type landings. The hydraulic pump failure occurred on a RTLS-type mission, which has different flight profile and different landing profile. So, it is not unreasonable to suggest this failure mode does not apply to ASDS. Yes, this is speculation - un-grounded - just like your variant. We both do not know the necessary facts (and never will).In contrast, your last example, SpX-DM1, does not belong to the group for sure, because it's a high profile mission where the schedule - when set - does have very high priority. In other words, SpaceX will definitely prefer to risk the booster landing over another launch delay.It seems to me you still missing the point (or, likely, I did not do good job with explaining it):I am NOT trying to say my explanation is right, nor his explanation is wrong - no.Neither I am trying to say my explanation is better than his.I gave my variant just to show that his is not the only one.Most ridiculous argument I have read. That the grid fin hydraulic pump would be guaranteed to fail or not depending on the direction the booster was flying???The fact is NASA and other customers don't care if the booster lands or not, they are just concerned that their payload gets to the desired orbit.
Launch window: May 16-22, 2019Status: Awaiting launch
Is it safe to assume DIDO-1 will launch as a secondary payload on this?I'm basing that on how DIDO-1 launch date has been moving along with Radarsat launch in the US Launch Schedule thread.
RCM spacecraft are prepared for vibration testing in the MDA facilities. (Credit: Canadian Space Agency)
Quote from: jacqmans on 03/26/2019 10:25 am RCM spacecraft are prepared for vibration testing in the MDA facilities. (Credit: Canadian Space Agency)That's an old photo, right? I mean, the sats should be at VAFB now.
40 days ‘til lift off! 🇨🇦’s RADARSAT Constellation Mission is scheduled to launch on June 11 from Vandenberg, California. Stay tuned for more information about the mission! http://asc-csa.gc.ca/RCM . 🛰️🛰️🛰️ Photo: CSA/@MDA_maxar #RCM #EO #EarthObservation #CDNSpace
Orbit: Sun-synchronous circular orbit (dawn-dusk mission), nominal altitude = 592.7 km, inclination = 97.74º, period = 96.4 minutes. The three spacecraft will be spaced at equal distances on the same orbital plane (120º apart) with a repeat cycle of 179 orbits/12days. The orbit selection allows revisiting the same area for coherent change detection every four days, which should enable a whole suite of interferometric applications.The satellites will be equally spaced in the same orbital plane, following each other with a time separation of ~32 minutes. While the ground track of each satellite is slightly shifted due to the Earth rotation, this orbital configuration provides the required ground coverage over the Canadian maritime zones using the medium resolution ScanSAR mode.Orbital tube of 100 m in radius.
SpaceX’s next West Coast Falcon 9 landing could be decided by baby sealsBy Eric Ralph Posted on May 7, 2019https://www.teslarati.com/spacex-confirms-falcon-9-launch-date-radarsat/
