Thor Delta E1 — mission imagery
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Isis 2

Thor Delta E1United States Air ForceSpace Launch Complex 2E
Thursday, April 1, 1971 · 02:57 AM UTC

This mission is complete.

Mission Brief

ISIS 2 was an ionospheric observatory instrumented with a sweep- and a fixed-frequency ionosonde, a VLF receiver, energetic and soft particle detectors, an ion mass spectrometer, an electrostatic probe, a retarding potential analyzer, a beacon transmitter, a cosmic noise experiment, and two photometers.

PayloadIsis 2
OrbitLow Earth Orbit
CustomerUnited States Air Force
StagesUnknown
PadSpace Launch Complex 2E, Vandenberg SFB, CA, USA

Mission Timeline

14 / 14100%

Ground vector

Launch site

Site locked

Space Launch Complex 2E

Vandenberg SFB, CA, USA

Global range
SITE LOCK
Latitude
34.752°N
Longitude
120.619°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

02:57 AM UTC - 02:57 AM UTC

Vehicle

Thor Delta E1

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HeightN/A
LEO PayloadN/A
Launches1,078
Successes972

Provider

United States Air Force

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Schedule History

No meaningful launch-time or status changes recorded.