Creation of CZML from Keplar elements

CesiumJS
1

Hi,

Is there a way to create CZML file from the given Kepler elements values - Perigee,Apogee, Incl, AOP,RAAN?

Seems the Kepler elements are to be first converted to Cartesian Coordinate system. Is there a methodology to that?

Thanks.

2

I could convert the Keplar elements to Cartesian coordinates using http://www.mathworks.in/matlabcentral/fileexchange/29272-skipping-stone-an-interplanetary-space-mission-design-tool/content/convert/kep2cart.m
But the coordinate x,y,z are not coming properly on around the globe as in example at http://cesium.agi.com/LotsOfSatellites/

Is there still a transformation required from these coordinates to Cesium coordinate system??

3

I’m not familiar with that code, but it probably computes position in the Earth-centered Inertial frame, while CZML defaults to the Earth-centered Fixed frame. You can specify the inertial frame in CZML by setting the “referenceFrame” sub-property of the “position” property to “INERTIAL”. See here.

The server-side of the Lots of Satellites demo was developed using AGI’s STK Components product, which does orbit propagation and many other things. AGI has made a huge investment in building Cesium and is giving it away for free, so it would be awesome if you took a look at their other offerings. Full disclosure: I work for AGI. I believe we frequently give the Lots of Satellites source code to STK Components users that request it.

Kevin