Quote from: Liss on 12/28/2016 06:28 pmQuote from: Satori on 12/23/2016 01:59 pmBY70-1 - Bayi Kepu Weixing-1Its full descriptive name is 八一学校科普小卫星 [Bāyī xuéxiào kēpǔ xiǎo wèixīng], that means August 1st School Science Small Satellite.August 1st is usually linked to PLA
Quote from: Satori on 12/23/2016 01:59 pmBY70-1 - Bayi Kepu Weixing-1Its full descriptive name is 八一学校科普小卫星 [Bāyī xuéxiào kēpǔ xiǎo wèixīng], that means August 1st School Science Small Satellite.
BY70-1 - Bayi Kepu Weixing-1
If the satellites salvage themselves, it would be a partial failure?
Quote from: baldusi on 12/28/2016 11:29 pmIf the satellites salvage themselves, it would be a partial failure?It all depends on the definition - and there is no common definition. In my book it would be a launch vehicle failure with the payloads inserted into an improper orbit. If the payloads are able to raise themselves to their planned orbits with propellant left for the mission, it would not be a mission failure. Similar to AV-009, CRS-1, STS-51F, etc. - Ed Kyle
"usable" orbit should be typical sso for optical remote sensing, not this type of strange orbit. Probably, the satellites are also designed to work in the typical sso, in terms of power budgets and imagery constraints. I dont know the satellite and the fuel mass but I have doubts if the onboard fuel will be enough to bring the satellites to any intended (target) sso.Seems like he satellites are "unusable" at the moment an will not be able to return as much image as defined in their contracts.
Quote from: Liss on 12/28/2016 06:28 pmQuote from: Satori on 12/23/2016 01:59 pmBY70-1 - Bayi Kepu Weixing-1Its full descriptive name is 八一学校科普小卫星 [Bāyī xuéxiào kēpǔ xiǎo wèixīng], that means August 1st School Science Small Satellite.August 1st is linked to PLA, that explains why the military channel (CCTV 7) had a long report earlier today on this amateur satellite (from which I extracted the picture above of ground test equipment showing amateur band frequencies)
Perhaps there was a programming error which led to the verniers being shut down at the same time as the main engine on the second stage? This could have prevented the verniers re-igniting to perform the de-orbit burn.
Quote from: Phillip Clark on 12/30/2016 10:57 amPerhaps there was a programming error which led to the verniers being shut down at the same time as the main engine on the second stage? This could have prevented the verniers re-igniting to perform the de-orbit burn.Phillip, the verniers started as planned as can be seen in this graph from the launch video: