STS-51 was a NASA Space Shuttle Discovery mission that launched the Advanced Communications Technology Satellite (ACTS) in September 1993. Discovery's 17th flight also featured the deployment and retrieval of the SPAS-ORFEUS satellite and its IMAX camera, which captured spectacular footage of Discovery in space. A spacewalk was also performed during the mission to evaluate tools and techniques for the STS-61 Hubble Space Telescope (HST) servicing mission later that year. STS-51 was the first shuttle mission to fly a Global Positioning System (GPS) receiver, a Trimble TANS Quadrex. It was mounted in an overhead window where limited field of view (FoV) and signal attenuation from the glass severely impacted receiver performance. Full triple-redundant 3-string GPS would not happen until 14 years later with STS-118 in 2007.
NASA launches Space Shuttle Discovery on STS-51.
On September 12, in the year 1993, NASA launches Space Shuttle Discovery on STS-51. This event is recorded as a Historical Events event in the history of September 12, one of 423 recorded events on this date across all of history.
Key Facts
- This event took place on September 12, 1993 (AD era).
- It is categorised as a Historical Events event in recorded history.
- Referenced in 1 Wikipedia article.
- Wikipedia source last updated on 15 July 2025.
On This Date in History 423
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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