alternative source of NEAR look angles

• Messages sorted by: [ date ][ thread ][ subject ][ author ]
• Next message: Jeff Hunt: "RE: Skymap 6.1"
• Previous message: Craig Cholar: "Unidentified subject!"

As another source of topocentric ephemerides note this information
from Donald Yeomans

For those interested in observing the NEAR spacecraft on its Jan 22-23
Earth flyby, the trajectory can be accessed via JPL's on-line ephemeris
system, Horizons.

This will allow you to compute customized spacecraft ephemerides for
your particular site (600 sites on file, or input your own coordinates).
Tabular quantities include azimuth, elevation, RA, DEC, angular rates,
distances, velocities, rise/set, state vectors, + more, at user selected
time steps.

To access, telnet to port 6775 on machine ssd.jpl.nasa.gov:
                 telnet ssd.jpl.nasa.gov 6775

No password or ID required. At the prompt, type "NEAR", and follow
subsequent prompts. Type ? or ?! at any prompt for help. Documentation
at ftp://ssd.jpl.nasa.gov/pub/ssd/Horizons_doc.ps

The system can be accessed by WWW.
See http://ssd.jpl.nasa.gov/cgi-bin/eph
Select the spacecraft and set appropriate times and observing sites.

Trajectory data developed and provided by the NEAR Navigation Team
at JPL:  Bobby Williams, Jim Miller, Cliff Helfrich

I have used the Web interface, which gives range in AU. A reply
from the persons running it says that if one uses the telnet
or e-mail entry one can customize the units of the output.
Tony Beresford

• Next message: Jeff Hunt: "RE: Skymap 6.1"
• Previous message: Craig Cholar: "Unidentified subject!"