Program

Great Obs

Payloads: 4
In orbit: 3
Operational (CelesTrak): 2
Re-entered: 1
First launch: 1990-04-24
Latest launch: 2003-08-25

Owners

NASA Goddard Space Flight Center2
Jet Propulsion Lab1
NASA Marshall Space Flight Center1

Built by

TRW Inc.2
Lockheed Martin Missiles and Space, Sunnyvale1
Lockheed Missiles and Space Co.1

Payloads in this program

Name	NORAD	Launch date	Status
HST	20580	1990-04-24	Operational
CGRO	21225	1991-04-05	Re-entered 2000-06-04
CXO	25867	1999-07-23	Operational
SPITZER (SIRTF)	27871	2003-08-25	Not operational

From GCAT by Jonathan McDowell (CC BY 4.0). Roles are counted from the catalogue itself, not from GCAT type labels, which GCAT describes as patchy. About this source