Manifest / 01Go
Chang'e 7
Long March 5
ProviderChina Aerospace Science and Technology Corporation
Pad101
DateAug 25, 2026
PrecisionAbout 12:30 AM UTC
Schedule watchTracking updates
T– about 2d 4hWindow opens 12:24 AM UTC
Back to launches
Success
Helios 1B
Ariane 40ArianespaceAriane Launch Area 2
Friday, December 3, 1999 · 04:22 PM UTC
This mission is complete.
Mission Brief
The Helios program is Europe's military optical reconnaissance system consisting of both a space and a ground segment, which commenced service in 1995, jointly funded by the French, Italian and Spanish governments. The Helios I optical observation satellites, launched in July 1995 and December 1999 respectively, can acquire high resolution images of any point on the globe, with daily revisit capability. Helios-1B had suffered a breakdown of its power supply system in October 2004 and could no longer perform any work after operating for just under its 5-year nominal life expectancy.
PayloadHelios 1B
OrbitPolar Orbit
CustomerArianespace
Stages2
PadAriane Launch Area 2, Guiana Space Centre, French Guiana
Mission Timeline
14 / 14100%Ground vector
Launch site
Site locked
Ariane Launch Area 2
Guiana Space Centre, French Guiana
Global range
- Latitude
- 5.232°N
- Longitude
- 52.778°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
04:22 PM UTC - 04:22 PM UTC
Provider
Arianespace
Profile →FRA • Founded 1980
Arianespace SA is a multinational company founded in 1980 as the world's first commercial launch service provider. It undertakes the production, operation, and marketing of the Ariane programme. Their vehicles...
Schedule History
No meaningful launch-time or status changes recorded.
