Kodak moments at Pluto: Help requested |
Kodak moments at Pluto: Help requested |
Apr 3 2008, 09:54 PM
Post
#1
|
|
Member Group: Members Posts: 717 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Hi folks-
We are deep in the process of planning the Pluto encounter (we're doing it now while all the essential people are still on the payroll!), and following the great success of our Jupiter "Kodak moment" program (thanks Hendric!), we are once again soliciting help from UMSF in planning scenic imaging of the Pluto system. Unlike at Jupiter, the only time when bodies in the Pluto system occult each other is within an hour of closest approach, when we'll be too busy for purely scenic imaging, but there may be interesting alignments or other opportunities at other times. To help find these opportunities, Henry Throop has kindly made available his New Horizons Geometry Visualizer, NHGV, which is the science team's prime geometry planning tool. It's at http://soc.boulder.swri.edu/nhgv . The tool shows the view of selected targets from the spacecraft at any time during the encounter. Below is some more detailed information from Henry. More information on the New Horizons instrument capabilities is available here. We'd like inputs by early June if possible- thanks in advance! John. QUOTE I have developed an on-line, graphical tool for planning and visualizing New Horizons observations. This is a web-based, graphical tool which uses SPICE to plot the position of bodies in the sky, and as they pass through the NH FOVs. The program is online at http://soc.boulder.swri.edu/nhgv . Features of NHGV (New Horizons Geometry Visualizer) include: * Integration with NAIF/SPICE, allowing for accurate positions and observing geometries for planets, satellites, and spacecraft * Integration with HD and Tycho-2 star catalogs, including access to catalog information such as positions, magnitudes, and stellar types * Light-time corrections for all computations * FOVs of all New Horizons remote sensing instruments * Wireframe images showing position grids and surface lighting * Albedo and surface composition maps * Display of Jovian aurora and satelite flux footprints * Lookup of spacecraft orientation and pointing from SPICE C-Kernels * Output of all data in graphical and table format * Flexible input and output coordinates, including both J2000 celestial and ecliptic systems * Cartesian or spherical projection of sky coordinates. * Simple web interface * Observations for a single time or a range of times * Rapid generation of tables of geometric parameters (distance, phase angle, etc.) over a time interval It can be thought of along the same lines as Dave Seal's DIGIT or Mark Showalter's Jupiter Viewer, although it has advantages over both (e.g., full access to star catalogs; NH FOV's; web-based; ecliptic coordinates; simple one-page interface). Although it was written for NH, it's really a much more general tool than that. Kernels are currently included for Rosetta, Messenger and Cassini, in addition to NH. It's used by the NH Science Team for planning future observations, and analyzing previous observations. This is essentially an internal tool that is being released externally on a trial basis, for use in planning potential NH observations. Please let me know of any significant problems. Extensive on-line documentation, examples, and screenshots are available at http://soc.boulder.swri.edu/nhgv/gv_info.php . Have fun! Henry Throop Southwest Research Institute Boulder, CO throop at boulder.swri.edu |
|
|
Apr 4 2008, 04:57 PM
Post
#2
|
|
Member Group: Members Posts: 717 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Thanks for all these! To answer questions, the Charon occultation by Pluto might be observed (for instance we might use Charon to backlight nighttime hazes on the dark side of Pluto), but science would be the driver (well, 90% of the driver- we like scenery too!). Purely scenic opportunities within three hours either side of c/a are unlikely, I'd say. And regarding outbound sun angles, we think we'll be able to point within about 10 degrees of the sun, and thus image the system on departure. We are likely to have image ghosts to contend with, but that problem should be manageable.
John. |
|
|
Lo-Fi Version | Time is now: 31st October 2024 - 11:50 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |