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-
- NEXTSTEP Satellite Tracking
-
- Version 1.2 of Rendezvous is now available from the NEXTSTEP archive sites.
- Rendezvous is a general purpose Satellite Tracking and Space Surveillance
- utility for NEXTSTEP users. See the Rendezvous1.2.README file on the
- archives for complete information.
-
- New for version 1.2
-
- o Lunar Eclipses are calculated and displayed in the Telescope
- Inspector window.
-
- o The Map in the Main Window now has an option to display the
- lunar shadow (umbra and penumbra) as it passes over the earth
- during a Solar Eclipse.
-
- o Autoscaling has been implemented in the Trajectory Plot Inspector.
- All graphs in the Trajectory Plots window are autoscaled
- by default.
-
- o Slight rearrangement of controls in the Telescope Inspector.
-
-
- New for version 1.1
-
- o A Solar System Inspector has been added which shows the
- relative positions of the planets in their orbits around
- the sun.
-
- o The Telescope Inspector now has an option to display the
- planets in the field of view allowing a user to find the
- azimuth and elevation to a planet from his location.
-
- Demo copies of Rendezvous are available at:
-
- ftp://ftp.cs.orst.edu/pub/next/submissions/Rendezvous1.2.tar.pkg
- ftp://sonata.cc.purdue.edu/pub/next/submissions/Rendezvous1.2.tar.pkg
-
- The copy on the ftp.cs.orst.edu site will eventually migrate to:
-
- ftp://ftp.cs.orst.edu/pub/next/binaries/science/demos/Rendezvous1.2.tar.pkg
-
- The demonstration copy is a fully functioning copy of Rendezvous, with the
- caveat that only calculations done with the Epoch Date set prior to June 1,
- 1994 are correct.
-
- For ordering information call Alembic Systems at:
-
- Alembic Systems
- 14 Inverness Dr E.
- Bldg G228
- Englewood CO 80111
- Voice: 1-800-452-7608
- Fax: 1-303-799-1435
- email: info@alembic.com
-
- Or contact Howard Cole at Tripod Engineering:
-
- Tripod Engineering
- 4816 McMahon Blvd NW
- N125
- Albuquerque, NM 87114
- Voice/Fax: 1-505-898-1483
- email: hcole@rt66.com
-
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- Version 1.0
-
- Tripod Engineering is pleased to announce the availability of Rendezvous,
- a MAB NEXTSTEP compatible satellite tracking and Space Surveillance tool.
-
- Rendezvous will read standard NASA/NORAD two line element set files and
- graphically display the orbit as a ground trace in any of three different
- world projections including a NASA-Select style globe. The solar terminator,
- earth coverage area, and satellite illumination conditions can be displayed on
- the map with the push of a button, providing an easy and intuitive means for
- determining if a satellite is visible from your location. Satellites may be
- flown forward or backward simply by changing the time in the clock, or
- selecting the day, month, or year in the handy calendar. The map is
- immediately updated to reflect the date and time you've selected.
-
- Ground station and satellite selections are displayed in browsers, and the
- engagement geometry between any set of sensors and targets may be viewed by
- selection in the browsers. Detailed plots of the engagement (azimuth,
- elevation, and range) can be shown in a separate window. A display of the
- sensor's field of view, including stars, targets, sun, moon, and earth
- horizon can be shown with the telescope inspector window, and the
- orientation of the sensor can be changed by adjusting the sliders. The sun
- and moon are displayed in the inspector window with their actual apparent
- size, and solar eclipses are displayed properly (lunar eclipses will be
- supported in the next release).
-
- Telescope boresight tracking supports four different modes. There is inertial
- tracking where the boresight remains fixed in inertial space as the telescope
- orbits. Second is fixed az-el mode in which an azimuth, elevation, and roll
- angle are specified in "local horizontal" (sometimes called topocentric) coordinates.
- As the telescope orbits, the boresight slowly changes to maintain this az/el/roll in
- its current instantaneous local horizontal (topocentric) system. The third and
- fourth modes are target tracking modes in which the telescope boresight is locked
- on to single targets or the centroid of a cluster of targets selected from a browser.
- As the telescope orbits, its boresight always remains pointed at the target or centroid.
-
- For the adventurous souls, the element set can be displayed and changed in
- nine different coordinate systems. This allows quick conversion between the
- commonly used systems (ECI, ECR, Orbital Elements, etc), and lets the user
- perform "what-if" type experiments by changing the values of various
- parameters. For example, if you were responsible for discarding the solar
- panel from the Hubble Space Telescope, would you recommend giving it a boost
- forward, backward, or to the side? Each of these scenerios can be explored
- quite easily by changing the velocity compenent of the Hubble Telescope state
- vector and watching the ensuing trajectory.
-
-