Concatenated receiver/transmitter names from observation collection.

[tristandijkstra]

Hi,

This is in relation to tudat-team/tudatpy-examples#28. I want to do some analysis on the residuals per observatory. Currently, I have a convoluted way of receiving this list:

residuals_observatories = observation_collection.concatenated_link_definition_ids
unique_observatories = set(residuals_observatories)


observatory_link_to_mpccode = {
    idx: observation_collection.link_definition_ids[idx][
        observation.LinkEndType.receiver
    ].reference_point
    for idx in unique_observatories
}

concatenated_receiving_observatories = np.array(
    [observatory_link_to_mpccode[idx] for idx in residuals_observatories]
)

We currently have a concatenated times, and concatenated_link_definition_ids, but it would be nice if we could have a similar concatenated receiver and transmitter. In this case I could use the receiver to identify the observatories per observation more easily. In a future example, where I use multiple targets for one observation collection, the concatted_transmitters list would be useful to identify which target an observation belongs to.