AVHRR X Scheduling System (XSCHED)

INTRODUCTION

Scheduling reception of AVHRR data is accomplished through software that modifies a master schedule of acquisition. This schedule indicates the satellite number, starting and ending date and time, and direction for each scene to be acquired. XSCHED is an interactive application used to add scenes to the master schedule. Modifying or deleting scenes in the master schedule may be accomplished using the ADAPS module SCHEDIT.

GETTING STARTED

XSCHED allows you to plot and select scenes for reception, print reports, and send the master schedule updates to the acquisition system. To run it, you should have $ADAPSBASE in your path. To start XSCHED type at the UNIX prompt:

xsched report_printer PostScript_printer

where report_printer is a landscape-mode printer for reports and PostScript_printer is a PostScript printer to create hard copies of pass plots.

XSCHED first calls the X windows system-based application XPLOT which allows you to interactively select scenes for reception. See the XPLOT User's Guide for information on how to display and select scenes. After you exit XPLOT, XSCHED sends any reports generated by XPLOT to report_printer, and any pass plots are sent to PostScript_printer.

To update the master schedule you must be able to copy to and remotely execute commands on the acquisition system. This means you must have a .rhosts file set up on the acquisition system. XSCHED copies the add.sch file created by XPLOT to the acquisition system, where the scenes described in that file will automatically be added to the master schedule.