My page does not perform any check on input: all you write is sent as-is to Horizons server, but I tried at least to take into account dependencies of some parameters from others, as per Horizons manual.
Page is not yet complete, but at least now it is possible to get the results in the same window of the query, and also to get with just one click:
- full list of available spacecrafts
- full list of available solar system bodies
- full list of available earth observatories
- full list of available output quantities, with full description of each one
About this last point, I am looking for some help: some of these quantities are quite complex, and I would like to add a picture explaining each one of them; I found some pictures on wikipedia, but was not able to find pictures for many others, so some help in drawing from scratch such pictures would be appreciated.
I prepared three images, now it's "just" a matter of associating quantities numbers to angle/segments in the images...
Output quantities: http://win98.altervista.org/space/exploration/quantities.html