During April 4-6 the orbit of Tiangong 2 was raised from 92.12 min, 374-382 km to 92.26 minutes, 379-391 km which is slightly above the 46-circuits repeating orbit period.Presumably this is in preparation for the Tianzhou 1 launch - still scheduled for April 23?
There are a few ways to translate text embedded in picture.Method 1: Upload the image to Google drive, then right click it and select Open in Google Doc. Google Doc will automatically detect text and language and extract it into text formatMethod 2: Use Google Translate Mobile APP, aim your phone camera at picture, it translates in real time. Or you can also upload picture to Google Translate APPMethod 3: Insert picture into Microsoft Onenote, right click the picture and select text. OneNote will try to extract textI don't know any space flight terms, but I will try to translate your picture literally shortly.
To avoid the no doubt unwanted fuss & attention that surrounded the end of their first space station is it known if the Chinese are planning to use a Tianzhou to shunt this one out of orbit? Would seem they could gather valuable data by doing so?
Quote from: Star One on 04/02/2018 09:23 amTo avoid the no doubt unwanted fuss & attention that surrounded the end of their first space station is it known if the Chinese are planning to use a Tianzhou to shunt this one out of orbit? Would seem they could gather valuable data by doing so?Tianzhou 2 is slated as the first cargo freighter to the Tiangong modular space station (NOT called Tiangong 3 by the Chinese!), to be launched after Tianhe 1 and before Shenzhou 12 in 2020.So, the Chinese plan is to let Tiangong 2 use its own propulsion system to bring itself out of orbit, as should have happened with Tiangong 1. Maybe they simply won't keep TG 2 in orbit as long as they were doing with TG 1?
China's Tiangong-2 spacelab made a dual-burn manuever on Jun 13 about 0645-0735 UTC, to lower its orbit from 380 x 386 km to 292 x 298 km
If someone at the NORAD told you that with the TLEs you calculate altitudes, it means that he was simply drunk.With the TLE alone you calculate absolutely nothing.With the TLE + the correct propagator (SGP4 or SDP4) you calculate the state of a satellite (position and velocity).With the state of the satellite you calculate anything else (including its altitude).