NASA NTRS · 19770016219
HEAO-A nominal scanning observation schedule
Abstract
The HEAO-A observatory, scheduled for launch in late June 1977, will spend most of its orbital lifetime in a scanning mode, spining from 0.03 to 0.1 rpm about an axis aligned with the sun. The dates of availability in the scan band are given for a list of 248 X-ray sources. Celestial maps of source locations and scan planes, and examples of the nighttime elevation of available sources are presented. This document is intended to aid ground-based observers in planning coordinated observations with HEAO-A.
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Fishman, G. J., Stone, R. L.. 1977-04-01. HEAO-A nominal scanning observation schedule. https://ntrs.nasa.gov/citations/19770016219
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