All of the NASA/JPL-generated SPICE data and allied software are freely
available to all U.S. citizens whose tax dollars make the operation of NASA
missions and the NAIF activity possible. In addition, NAIF makes these data
and software available to everyone around the globe. (There may be
government-based access restrictions at some locales.) As such, the global
public has free access to exactly and entirely the same data and software
that are provided to NASA's solar system exploration projects' scientists and
engineers; nothing is held back.
Some foreign space agencies also make their SPICE data freely available to the
public from their own archives.
Using SPICE data files—usually referred to as "kernels"—requires
the use of SPICE Toolkit software to compute interesting observation geometry
parameters such as positions, altitudes, lighting angles, and latitudes and
longitudes. Thus, using SPICE data normally requires good programming skills
since most SPICE software is in the form of application program interfaces
(APIs), often called subroutines or modules, that a user integrates into
her/his own application program. Consider reading the
SPICE Overview tutorial to get a more complete view of this process.
Members of the public who wish to try their hand at using SPICE data and
software may make use of the same training materials NAIF offers to
professional scientists and engineers. The primary resources are a set
and a self-guided
training course based on those tutorials and "open book" programming lessons.
All of the SPICE Toolkit
software is very well
You will have to be willing to spend the time to read the tutorials and to try
the programming lessons!
One alternative to writing your own program using SPICE APIs is to use NAIF's
on-line geometry engine, named WebGeocalc. With this tool a person can make
many rather complicated observation geometry calculations without having to
write code: one uses a web browser to select the desired computation, select
the data (SPICE kernels) to be used, and provide needed command instructions.
After pressing the CALCULATE button the results of the computation appear in
your browser's window. In some cases the results may include simple graphs.
You can read more about
WebGeocalc here. But take note: even using this tool requires some
understanding of space geometry, and the prospective user MUST read the
"About the Data" webpage linked to from within the tool!
No Payoff for Hacking NAIF
If "hacking NASA" is your thing, poking at this website will not be rewarding
since everything produced by NAIF is freely, openly offered right here. This
includes exposing folders within which data and software may be found. We
realize that exposing folders is generally NOT common practice on websites,
but it is intentional here.
Instead of hacking, why not consider learning enough about SPICE data and
software to construct some truly novel and useful tools that could be of
interest to scientists, engineers and the public around the globe? You could use the "SPICE_Discussion" Mailman system (see bottom of NAIF's home page) to discuss such possibilities with interested scientists and engineers.