Satellite Situation Center (SSCWeb)

SSCWeb provides trajectories for solar system objects such as planets, moons, and spacecraft in different coordinate systems. Its integration into Speasy makes it easy to get any available trajectory for any time range.

Basics: Getting data from SSCWeb module

First, check that the trajectory you want is available. The easiest way is to browse Speasy’s dynamic inventory, which is always up to date:

>>> import speasy as spz
>>> ssc_trajectories = spz.inventories.flat_inventories.ssc.parameters
>>> # hundreds of spacecraft are available, keyed by their id
>>> 'ace' in ssc_trajectories
True
>>> len(ssc_trajectories) > 100
True

Note that you can also use your python terminal completion and browse spz.inventories.data_tree.ssc.Trajectories to find your trajectory. Once you have found your trajectory, you can choose the coordinate system for the download. Available coordinate systems: geo, gm, gse, gsm, sm, geitod, geij2000. The default is gse.

>>> import speasy as spz
>>> # Let's assume you wanted to get MMS1 trajectory
>>> mms1_traj = spz.ssc.get_data(spz.inventories.data_tree.ssc.Trajectories.mms1, "2018-01-01", "2018-02-01", 'gsm')
>>> mms1_traj.columns
['X', 'Y', 'Z']
>>> mms1_traj.values
array([[57765.7789, 39928.6469, 36127.6976],
       [57636.7873, 39912.6769, 36075.1812],
       [57507.6709, 39896.6512, 36022.4395],
       ...,
       [74135.0437,   741.7233, 27240.7339],
       [74007.2467,   795.057 , 27220.3705],
       [73879.1839,   848.3518, 27199.876 ]], shape=(44640, 3))