What is heao?

Some articles on heao:

HEAO Program
... After launch, they were denoted HEAO 1, HEAO 2 (also known as The Einstein Observatory), and HEAO 3, respectively ...
High Energy Astronomy Observatory
... can refer to 1st High Energy Astronomy Observatory (HEAO 1) Einstein Observatory (HEAO 2) 3rd High Energy Astronomy Observatory (HEAO 3) HEAO Program Note that the correct (original) names for these three ...
HEAO Program - HEAO 2 A/K/A Einstein Observatory
... HEAO 2, more commonly known as the Einstein Observatory, launched 13 November 1978 into a 23.5 deg inclination orbit ... HEAO 2 differed from HEAO 1 and HEAO 3 in that it was used for pointed, deep, small-field-of-view observations rather than sky-survey studies ...
Cosmic-ray Observatory - Observatories and Experiments
... ACE (Advanced Composition Explorer) Voyager 1 and Voyager 2 Cassini-Huygens HEAO 1, Einstein Observatory (HEAO2), HEAO 3 Balloon-borne BESS (Balloon-borne Experiment with Superconducting Spectrometer) ATIC (Advanced ...
HEAO Program - Program
... The experiment designations A1, A2, A3, A4, for HEAO A, thru C1, C2, C3 for HEAO C, were most common before launch, but also often appear in the later scientific literature ... The overall HEAO program was managed out of NASA's Marshall Space Flight Center in Huntsville, AL ...