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.

From Wikipedia, the free encyclopedia

Explorer 24
Explorer 24.jpg
Explorer 24.
Mission typeEarth science
COSPAR ID1964-076A[1]
SATCAT no.931
Mission duration1,426 days[2]
Spacecraft properties
BusADE bus
ManufacturerLangley Research Center
Launch mass8.6 kg (19 lb)
Start of mission
Launch date21 November 1964, 17:09:39 (1964-11-21UTC17:09:39) UTC[3][4]
RocketScout X-4[5]
Launch siteVandenberg SLC-5[5]
End of mission
Decay date18 October 1968 (1968-10-19)[1]
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude525 km (326 mi)[1]
Apogee altitude2,498 km (1,552 mi)[1]
Period116.3 minutes[1]
Epoch21 November 1964[1]
Nonsystematic Changes of Air Density
Systematic Changes of Air Density

Explorer 24 (also called AD-B and S-56C) was a U.S. satellite designed for atmospheric studies. Explorer 24 was launched on 21 November 1964 from Vandenberg Air Force Base, Lompoc, California, with a Scout rocket. Explorer 24 was launched along with its successor satellite, Explorer 25.

YouTube Encyclopedic

  • 1/5
    11 809
    26 853
    2 643
    22 749
  • Explorer 1: America’s First Satellite
  • Explorer 1: First U.S. Satellite
  • Scientific Explorer Rocket Car
  • Star Hopper Model Rocket Build
  • EXPLORER S-1,Juno 2 rocket explosion,July 16,1959



Explorer 24 was placed in orbit together with Explorer 25 from a single launch vehicle. Explorer 24 was identical in configuration to the previously launched balloon satellites Explorer 9 and 19. The spacecraft was 3.6 m in diameter, was built of alternating layers of aluminum foil and plastic film, and was covered uniformly with 5.1-cm white dots for thermal control.

It was designed to yield atmospheric density near perigee as a function of space and time from sequential observations of the sphere's position in orbit. To facilitate ground tracking, the satellite carried a 136 MHz tracking beacon.

The satellite reentered the earth's atmosphere on October 18, 1968.[1]


Explorer 24 helped determine the variation in density between the day and night of the Earth and gave rise to studies on the zone winds in the exosphere, at an altitude of between 450 kilometres (280 mi) and 620 kilometres (390 mi).[6][7]


  1. ^ a b c d e f g h i "S 55C". NSSDC Master Catalog. NASA Goddard Space Flight Center. Retrieved 10 June 2018. This article incorporates text from this source, which is in the public domain.
  2. ^ "1964-076A - Explorer 24". Space 40 (in Czech). Lubor Lejček, Antonín Vítek. Retrieved 10 June 2018.
  3. ^ "Launch Log". Jonathan's Space Page. Retrieved June 10, 2018.
  4. ^ "Letter dated 5 February 1965 from the Permanent Representative of the United States of America addressed to the Secretary-General" (PDF). COMMITTEE ON THE PEACEFUL USES OF OUTER SPACE. UNOOSA. November 30, 1964. Archived from the original on 5 May 2018. Retrieved 10 June 2018.
  5. ^ a b "Explorer". Encyclopedia Astronautica. Mark Wade. Retrieved 10 June 2018.
  6. ^ Jacchia, L. G.; Slowey, J. (1966). "The Shape and Location of the Diurnal Bulge in the Upper Atmosphere". SAO Special Report (207). Jacchia, L. G. & Slowey, J. 207. Bibcode:1966SAOSR.207.....J.
  7. ^ Blum, P. W.; Schuchardt, K. G. H. (June 24, 1976). "Exospheric zonal winds between 540 and 620 km from the orbit of Explorer 24". Planetary and Space Science 24: 529–539. Blum, P. W.; Schuchardt, K. G. H. 24 (6): 529. Bibcode:1976P&SS...24..529B. doi:10.1016/0032-0633(76)90131-8.
This page was last edited on 6 March 2021, at 17:08
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.