SPROUT
Re-entered NORAD 39770 EGOY-0622-3973-5317-4250 Japan
2014
Launch
4
Observations all time
Demonstration of inflatable membrane structure.
Verification of design methods and the space demonstration of deploying of the inflatable membrane structure. Demonstration of the attitude determination and control technology of nano-satellite. Prediction of orbit descent rate change by the inflatable membrane structure. Operation of satellite by a ham radio operator.
The satellite burned up in the atmosphere
Gallery
1 39770U 14029E 24224.87032687 .18403858 29146-5 12830-2 0 9997
2 39770 97.9775 25.0334 0015086 283.9081 76.0538 16.39772937556368
Mean elements of every TLE set over the past 365 days, plotted against the epoch of the set. Each source is its own line; click it in the legend to hide it. A jump in altitude is a manoeuvre or a bad set; lines drifting apart are a disagreement between sources. “TLE age” is how many hours have passed since the epoch of the source's freshest set, plotted against when the set reached us, on a logarithmic scale. A set the source repeats unchanged does not reset the age.
Each TLE set is propagated with SGP4 to the epoch of the next set from the same source and compared with it, plotted against the epoch of the next set; the tooltip shows how many hours ahead the prediction ran. The logarithmic scale shows the size of the divergence and the tooltip its sign: plus along-track means the prediction is ahead of the satellite. This is how well the sets agree, not the true error: the reference is a TLE too, off by about a kilometre. An outlier is a manoeuvre between sets. Sets more than a week apart are not compared.