Американские разведывательные спутники KH-11: История и развитие

Type of American spy satellite

The KH 11 KENNEN (later renamed CRYSTAL, then Evolved Enhanced CRYSTAL System, and codenamed 1010 and Key Hole

Later KH 11 satellites have been referred to by outside observers as KH 11B or KH 12, and by the names "Advanced KENNEN", "Improved Crystal" and "Ikon". Official budget documents refer to the latest generation of electro optical satellites as Evolved Enhanced CRYSTAL System. The Key Hole series was officially discontinued in favor of a random numbering scheme after repeated public references to KH 7 GAMBIT, KH 8 GAMBIT 3, KH 9 HEXAGON, and KH 11 KENNEN satellites. The capabilities of the KH 11 are highly classified, as are the images they produce. The satellites are believed to have been the source of some imagery of the Soviet Union and China made public in 1997; images of Sudan and Afghanistan made public in 1998 related to the response to the 1998 U. S. embassy bombings; and a 2019 photo, provided by then President Donald Trump, of a failed Iranian rocket launch.

The Film Read Out KH 7 GAMBIT (FROG) served as NRO Program A's competitor to NRO Program B's initial electro optical imagery (EOI) satellite. After a precursor EOI study with the codeword Zoster, President Nixon on 23 September 1971 approved the development of an EOI satellite under the initial codeword Zaman. In November 1971, this codeword was changed to Kennen, which is Middle English for "to perceive". Initial director of the ZAMAN/KENNEN Program Group was Charles R. "Charlie" Roth, who in Oct 1975 was succeeded by Rutledge P. (Hap) Hazzard. Data is transmitted through a network of communications satellites; the Satellite Data System (SDS). The initial ground station for the processing of the electro optical imaging was a secret National Reconnaissance Office facility in Area 58, later confirmed to be located in Fort Belvoir in Virginia. In 1999, NRO selected Boeing as the prime contractor for the Future Imagery Architecture (FIA) program, aimed at replacing the KH 11 satellites by a more cost effective constellation of smaller, and also more capable reconnaissance satellites. After the failure of the FIA in 2005, NRO ordered from Lockheed two additional legacy hardware KH 11s. USA 224, the first of these two, was launched in early 2011 two years ahead of the initial schedule estimate.

According to Lew Allen, the initial key design elements were specified by Edwin H. Land. They included i) solid state focal plane array, ii) integrated circuits for complex data processing, iii) large, fast optics with a diameter f/2 primary mirror, iv) gigabit/s data link, v) long on orbit operational lifetime for the imaging satellites, and vi) communication satellites to facilitate close to realtime downlink of the images.

KH 11s are believed to resemble the Hubble Space Telescope in size and shape, as they were shipped in similar containers. Their length is believed to be 19.5 meters, with a diameter of up to A NASA history of the Hubble, in discussing the reasons for switching from a 3 meter main mirror to a design, states: "In addition, changing to a 2.4 meter mirror would lessen fabrication costs by using manufacturing technologies developed for military spy satellites". Different versions of the KH 11 vary in mass. Early KH 11s were reported to be comparable in mass to the KH 9 HEXAGON, i. e. about Later blocks are believed to have a mass of around to .

A CIA history states that the primary mirror on the first KH 11s measured , but sizes increased in later versions. Later satellites had larger mirrors, with a diameter of around Jane's Defence Weekly indicates that the secondary mirror in the Cassegrain reflecting telescope system could be moved, allowing images to be taken from angles unusual for a satellite. Also, there are indications that the satellite can take images every five seconds.

The initial KH 11 camera system offered frame and strip modes. The focal plane was equipped with an array of light sensitive silicon diodes, which converted brightness values to electrical signals. The packaging density was sufficiently high (several hundred diodes per inch) to match the ground sample distance of the CORONA satellites. The recorded digital signal was encrypted and transmitted to a ground station in near real time, and written to film by means of a laser in order to recreate the recorded image. The first charge coupled device (CCD) detectors for KH 11 were developed by Westinghouse Electric Corporation at their Baltimore facility in the later 1970s. KH 11 Block II might have been the first reconnaissance satellite equipped for imaging with an 800 × 800 pixels CCD. Later block satellites may include signals intelligence capabilities and greater sensitivity in broader light spectrums (probably into infrared).

Communication to and data downloads from KH 11 satellites are routed through a constellation of communication relay satellites in higher orbits. The initial communications relay payload is believed to have operated at a frequency of 60 GHz, as radio emission at this frequency is blocked by Earth's atmosphere, and thus not detectable from the ground. Launch of the initial two Satellite Data System satellites occurred in June and August 1976, i. e. ahead of the first launch of a KH 11 satellite in late 1976. One of the initial on orbit challenges were failures of the Traveling wave tubes, which did amplify the communications signals sent from the imaging satellite to the relay satellites, and from the relay satellites to the ground stations. During crossings of the ionosphere, ions could built up on the outside of the tubes, which were operated at 14,000 volt. This resulted in repeated sparking, and depositing of carbon traces inside the tubes, ultimately shorting them out. The issue could be abated by changing the orbiting satellite's orientation during crossing of the ionosphere, and was finally solved by better shielding of the tubes in follow up satellites.

A perfect mirror observing in the visual spectrum (i. e. at a wavelength of 500 nm) has a diffraction limited resolution of around 0.05 arcsec, which from an orbital altitude of corresponds to a ground sample distance of Operational resolution should be worse due to effects of the atmospheric turbulence. Astronomer Clifford Stoll estimates that such a telescope could resolve up to "a couple inches. Not quite good enough to recognize a face".

Five generations of U. S. electro optical reconnaissance have been identified:

Block I refer to the original KH 11 satellite, of which five were launched between 19 December 1976 and 17 November 1982.

The three Block II satellites are in the open literature referred to as KH 11B, the alleged DRAGON codename, or CRYSTAL, and are believed to be capable of taking infrared images in addition to optical observations. Another improvement was an eightfold increase in the download rate compared to earlier models to facilitate improved real time access and increased area coverage. From Block III on, the typical lifetime of the satellites increased to about 15 years, possibly related to a higher lift off mass, which facilitates larger fuel reserves for countering atmospheric drag.

Three electro optical satellites launched in October 2005, January 2011, and August 2013 are attributed to Block IV.

A new generation of clandestine communications satellites launched to inclined geosynchronous orbits have led to speculations that these are in support of Block V electro optical satellites scheduled for launch in late 2018 (NROL 71) and 2021 (NROL 82). The two satellites have been built by Lockheed Martin Space Systems, have a primary mirror with a diameter of 2.4 meters, and are evolutionary upgrades to the previous blocks built by Lockheed. Based on the published hazard areas for the launch, an orbital inclination of 74° has been deduced for NROL 71. This could indicate that NROL 71 is targeted for a Type II Multi Sun Synchronous Orbit, which would enable the satellite to study the ground at a range of local hour effects (shadow direction and length, daily activities, etc. ).

The Misty satellite is believed to have been derived from the KH 11, but modified to make it invisible to radar, and hard to detect visually. The first Misty satellite, USA 53, was released by the on mission STS 36 in 1990. The USA 144 satellite, launched on 22 May 1999 by a Titan IVB from Vandenberg Air Force Base may have been a second Misty satellite, or an Enhanced Imaging System spacecraft. The satellites are sometimes identified as KH 12s. In January 2011, NRO donated to NASA two space Optical Telescope Assemblies with diameter primary mirrors, similar in size to the Hubble Space Telescope, yet with steerable secondary mirrors and shorter focal length (resulting in a wider field of view). These were initially believed to be KH 11 series "extra hardware", but were later attributed to the cancelled Future Imaging Architecture program. The mirrors are to be used by NASA as the primary and spare for the Roman Space Telescope.

In 1978, a young CIA employee named William Kampiles was accused of selling a KH 11 System Technical Manual describing design and operation to the Soviets. Kampiles was convicted of espionage and initially sentenced to 40 years in prison. Later, this term was reduced, and after serving 18 years, Kampiles was released in 1996. In 1984 Samuel Loring Morison, an intelligence analyst at the Naval Intelligence Support Center, forwarded three classified images taken by KH 11 to the publication Jane's Defence Weekly. In 1985, Morison was convicted in Federal Court on two counts of espionage and two counts of theft of government property, and was sentenced to two years in prison. He was pardoned by President Clinton in 2001. In 2019 Donald Trump, as President of the United States, tweeted a classified image of the aftermath of a failed test of Iran's Safir rocket, which some believe was taken from the USA 224 satellite. In Seymour Hersh's book The Samson Option: Israel's Nuclear Arsenal & American Foreign Policy Ari Ben Menashe says that Israel had stolen images from the KH 11 in order to target missiles at the Soviet Union.

Estimated unit costs, including launch and in dollars, range from US$1.25toUS$1.75billion (inflation adjusted tobillion in ). In , after the launch of USA 224, DNRO Bruce Carlson announced that the procurement cost for the satellite had been $2billion under the initial budget estimate, which would put it at about $4.4billion (inflation adjusted billion in ).