#Update #Space #India #thread
Two days after #Chandrayaan3 landing, @isro released this video of #Pragyan rolling out from #Vikram. All systems healthy. Let's look at more & also how much data #Chandrayaan2 orbiter (around the #Moon since 2019) has sent so far. 1/n
Two days after #Chandrayaan3 landing, @isro released this video of #Pragyan rolling out from #Vikram. All systems healthy. Let's look at more & also how much data #Chandrayaan2 orbiter (around the #Moon since 2019) has sent so far. 1/n
#Pragyan rolled out early Thursday (yesterday) morning and began roving later in the day. It’s payloads are expected to be turned on later today (Friday). 2/n
The rover's movement will be restricted to be within the observational area. Both Vikram and Pragyan are designed to function for one lunar day (14 Earth days). 4/n
On why the rover took more than four hours to roll out, Isro chairman S Somanath said: “After the nominal landing, a lot of things needed to be checked, including inclination, terrain condition, temp & wait for the lunar dust to settle before the rover could be brought out… 5/n
…Once all these checks were done, the ramp deployment was completed and the rover came out late last night.” 6/n
He said that the process of turning on the payloads on the rover would commence late on Thursday and they should be on by Friday, when other payloads on the lander also get turned on. 7/n
Of the 15 instruments, 8 are from the Chandrayaan-2 orbiter, which has been around the Moon since 2019. In fact, India has already received more than 65 terabytes (TB) of data from the orbiter — 1TB, for instance, can hold approximately 500 hours of movies! 9/n
Most of this data, about 60TB, has come from the four major instruments developed by SAC: the Terrain Mapping Camera (TMC), Imaging InfraRed Spectrometer (IIRS), Orbiter High Resolution Camera (OHRC) and Dual Frequency Synthetic Aperture Radar (DFSAR). 10/n
SAC director Nilesh M Desai, told me: “Placed in its intended orbit in Aug 2019, the orbiter continues to enrich our understanding of Moon’s evolution & mapping of minerals & water molecules in Polar regions, using its 8 scientific instruments, 4 of which were built by us.” 11/n
About 4.5TB of data has come from Solar X-ray Monitor (XSM), which detects X-rays emitted by the Sun and its corona. This was developed by the Physical Research Laboratory (PRL). 12/n
PRL director Anil Bharadwaj said: “XSM has done some path-breaking observations which supports another instrument on called CLASS (Chandrayaan-2 Large Area Soft X-ray Spectrometer) developed by URSC... 13/n
…CLASS studies the X-rays coming from the Sun and how they get scattered by the elements from lunar surface.” 14/n
Initially, Chandrayaan-2 datasets were kept in a nine-month lock-in period for calibration and peer review purposes. Post that, it has resulted in multiple scientific papers from across the world. n/n
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