NASA Spacecraft Database
Posted 18 September 2012 - 06:22 PM
While searching for satellite database on the web, I found that NASA has a rather comprehensive spacecraft database that is searchable by the public.
For most of the objects, trajectory details are also provided. One example:
Periapsis Apoapsis Period Inclination Eccentricity
505.0 km 550.0 km 95.19999694824219 minutes 74.0° 0.0032560001127421856
I am still trying to learn the basics of orbit parameters through Wikipedia,
It seems to me that NASA's parameters missed the Longitude of Ascending Node, and the Argument of Periapsis. So shape is unambiguously defined, but not orientation.
What did I miss here?
Posted 21 September 2012 - 07:31 AM
Edit: fixed spelling
Posted 23 September 2012 - 07:03 PM
Do you know of any other resources for better data of the satellites? Given the fact that there are multiple websites with live satellite tracking services, there must be such resources. Though for my little toy research project, I'll need complete trajectory information on all the earliest satellites that are no longer circulating the planet Earth.
Posted 23 September 2012 - 07:18 PM
I started a company called Mr. Orbit that sold customized satellite predictions for a month. They had to be customized because they are different for each city. They could only be good for a month because the orbits decay too much to accurately predict where a satellite will be more than a month in advance. At least for the satellites that are in very low Earth orbit, the ones that are the brightest.
You can understand what the numbers mean in the two-line orbital elements here.