Vanguard — mission imagery
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Vanguard II

VanguardUS NavyLaunch Complex 18A
Tuesday, February 17, 1959 · 03:55 PM UTC

This mission is complete.

Mission Brief

Vanguard II is an Earth orbiting satellite and the first weather satellite. It was designed to measure cloud-cover distribution over the daylight portion of its orbit for a period of 19 days and to provide information on the density of the atmosphere.

PayloadVanguard II
OrbitMedium Earth Orbit
CustomerUS Navy
StagesUnknown
PadLaunch Complex 18A, Cape Canaveral SFS, FL, USA

Mission Timeline

14 / 14100%

Ground vector

Launch site

Site locked

Launch Complex 18A

Cape Canaveral SFS, FL, USA

Global range
SITE LOCK
Latitude
28.449°N
Longitude
80.564°W

Range Weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather Rules

Tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

03:55 PM UTC - 03:55 PM UTC

Vehicle

Vanguard

Profile →
HeightN/A
LEO PayloadN/A
Launches18
Successes3

Provider

Schedule History

No meaningful launch-time or status changes recorded.