To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

Intelsat III F-4

From Wikipedia, the free encyclopedia

Intelsat III F-4
Mission typeCommunications
COSPAR ID1969-045A[1]
SATCAT no.03947[2]
Mission duration5 years design life
Spacecraft properties
Launch mass647 kilograms (1,426 lb)
BOL mass151 kilograms (333 lb)
Dry mass293 kilograms (646 lb)
Start of mission
Launch date22 May 1969, 02:00 (1969-05-22UTC02Z) UTC
RocketDelta M
Launch siteCape Canaveral LC-17A
End of mission
Orbital parameters
Reference systemGeocentric
Perigee altitude35,276 kilometres (21,919 mi)
Apogee altitude35,670 kilometres (22,160 mi)
Inclination0.5 degrees
Period1,418.9 minutes
Epoch22 May 1969
Intelsat III

Intelsat III F-4 was a geostationary communications satellite built by TRW, it was owned by Intelsat, a company currently based in Luxembourg. The satellite had an estimated useful life of 5 years.

The Intelsat III F-4 was part of the Intelsat III series which consisted of eight satellites, which were used for retransmission of global commercial telecommunications, including live TV.

The satellite was stabilized by rotation with a minus antenna structure (its antenna was 34 inches high). It had a hydrazine propulsion system with four propellers and four tanks. Passive thermal control. With solar cells producing 178W peak, nine Ahr NiCd batteries. The load consisted of two transponders that used 12 watt TWTA amplifiers for multiple access, 1500 audio circuits or four TV channels. The Intelsat III F-1 was disabled due to launch vehicle failure.

The satellite was successfully launched into space on May 22, 1969, by means of a Delta M vehicle from Cape Canaveral Air Force Station in Florida, United States. It had a launch mass of 293 kg.[3]

YouTube Encyclopedic

  • 1/3
  • Countdown to Success(Atlas/Centaur Missle) March 1976 HACL Film 00163
  • HACL Film 00021 Assembling the Atlas and Shipping it to the Cape
  • Atlas II\AC-116 EHF Follow on #5, 31 May 1995 HACL Video 00016



  1. ^ NASA Goddard Space Flight Center. INTELSAT 3 F-4. NSSDC Master Catalog. Retrieved 19 April 2017.
  2. ^ INTELSAT 3-F4 Retrieved 19 April 2017.
  3. ^ Krebs, Gunter. Intelsat 3. Gunter's Space Page. Retrieved 19 April 2017.
This page was last edited on 21 August 2019, at 03:36
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.