Answer in bold.
Quote from: Svetoslav on 05/30/2017 06:15 pm...the private company Rocket Lab launched its first Electron rocket on a test flight....So why isn’t Schiaparelli judged on the same ground? ..Answer in bold. Good writeup though. One thing that cannot be said is that GNC design team didn't have enough time to work this out: the lander GNC architecture was in development for almost a decade.
...the private company Rocket Lab launched its first Electron rocket on a test flight....So why isn’t Schiaparelli judged on the same ground? ..
Personally, I think that Schiaparelli's landing was a failure because of the botched sw engineering process. [...]Failures from lack of experience is fine. From single obscure mistake, is fine. From fundamental handling of high reliability programming, it's not.
..Failures from lack of experience is fine. From single obscure mistake, is fine. From fundamental handling of high reliability programming, it's not.
Quote from: baldusi on 05/30/2017 11:34 pm..Failures from lack of experience is fine. From single obscure mistake, is fine. From fundamental handling of high reliability programming, it's not.Just a small nitpick: technically the issue wasn't with programming. The software development contractor apparently took the modeled design and implemented as is. Design error, rather than implementation, but it doesn't change the point. This is not how you design high reliability avionics.
On 25 June, the Trace Gas Orbiter (TGO) will suspend its aerobraking campaign until the end of August due to Mars' conjunction with the Sun.[...]Upon arrival at Mars on 19 October last year, the TGO orbit was 33,000 x 205 km, the goal of the approximately 11-month-long aerobraking campaign is to bring this to a 370 x 420 km quasi-circular orbit.From March to June this year, the orbit duration was reduced from 24 to approximately 14 hours using this aerobraking technique. The target is to reach an orbit that lasts about two hours for the science phase of the mission. As the orbit duration is gradually reduced, the more frequent orbits will require constant communication with the spacecraft – from January 2018 on, deep space antennas from ESA Estrack and NASA DSN will connect to TGO, 24 hours a day, 7 days a week.[...]In May, TGO was a little behind with its descent plan because of this 'safety first' approach. This cautious tactic has helped the team to understand more accurately any possible failures and evolve ways to successfully avoid them. Since this slower beginning (aerobrakign began in full in March), the approach has gradually been made more aggressive, and as a result the craft has caught up to the original plan, and is now slightly ahead of schedule.
EXOMARS 2016 POST FLIGHT MISSION ANALYSIS OF SCHIAPARELLI COASTING, ENTRY, DESCENT AND LANDINGFor the ExoMars2016 Mission, Thales Alenia Space Italia acted as prime contractor, leading the Spacecraft Composite development and verification (including the system design and verification of the EDM and key GNC/EDL technologies). DEIMOS Space has been involved in the Exomars Programme (2016 and 2020 missions) since 2004 providing more than 10 years of technical activities in the areas of End to End (from launch to landing) Mission Engineering and GNC. In particular, for the 2016 mission DEIMOS Space was responsible in Phase E of the Mission Anal- ysis of the Schiaparelli mission, from separation from the TGO to landing on Mars, covering the pre-flight trajectory predictions and performance analysis [1] and the post flight analyses presented here.
ATMOSPHERIC MARS ENTRY AND LANDING INVESTIGATIONS & ANALYSIS (AMELIA) BY THE EXOMARS 2016 SCHIAPARELLI MODULE
PRELIMINARY ANALYSIS OF ENTRY AND DESCENT RADIO COMMUNICATIONS OF EXOMARS 2016 SCHIAPARELLI.
ACHIEVEMENTS OF THE COMARS+ INSTRUMENTATION PACKAGE DURING THE ENTRY FLIGHT PHASE OF THE EXOMARS SCHIAPARELLI LANDER
Almost there! @ESA_TGO is now below the 3h orbit mark, and still aerobreaking. In blue our orbit this afternoon, in red when we stop, in green the final circularised orbit. Just a month to go, instruments and team getting ready for science!
https://twitter.com/Marmelleade/status/958350998208172035Quote from: Armelle HubaultAlmost there! @ESA_TGO is now below the 3h orbit mark, and still aerobreaking. In blue our orbit this afternoon, in red when we stop, in green the final circularised orbit. Just a month to go, instruments and team getting ready for science!
Built in Bulgaria instrument called Lulin-MO takes important measurements about the impact of radiation on astronaut's health.Here's the article: http://www.sciencedirect.com/science/article/pii/S0019103517305705Quote from Abstract: " Data show that during the cruise to Mars and back (6 months in each direction), taken during the declining of solar activity, the crewmembers of future manned flights to Mars will accumulate at least 60% of the total dose limit for the cosmonaut's/astronaut's career in case their shielding conditions are close to the average shielding of Liulin-MO detectors—about 10 g cm−2."
Quote from: eeergo on 01/30/2018 02:43 pmhttps://twitter.com/Marmelleade/status/958350998208172035Quote from: Armelle HubaultAlmost there! @ESA_TGO is now below the 3h orbit mark, and still aerobreaking. In blue our orbit this afternoon, in red when we stop, in green the final circularised orbit. Just a month to go, instruments and team getting ready for science!Impressive progress! Was it supposed to be February or March that areobraking completes?
Slowed by skimming through the very top of the upper atmosphere, @ESA_TGO has lowered itself into a #PlanetHugging orbit and is about ready to begin sniffing the #RedPlanet for methane #ExoMars http://www.esa.int/Our_Activities/Operations/Surfing_complete …
YES! Aerobraking is complete! Some orbit adjustments still to make in coming weeks, but then… #SCIENCE!! Full story: