Taken from Blackstar’s new ‘Black ops and the Shuttle’ article on The Space Review website.QuoteThe NRO plans on declassifying information about the early KENNEN satellites early next year.)http://thespacereview.com/article/3390/1
The NRO plans on declassifying information about the early KENNEN satellites early next year.)
Quote from: Star One on 12/12/2017 06:26 amTaken from Blackstar’s new ‘Black ops and the Shuttle’ article on The Space Review website.QuoteThe NRO plans on declassifying information about the early KENNEN satellites early next year.)http://thespacereview.com/article/3390/1But I would not hold your breath...
...but, but, but..... Exhale......
Quote from: kevin-rf on 12/12/2017 02:38 pm...but, but, but..... Exhale......In June 2016 I was informed that the SIGINT material would be released in October 2016. It was released in November 2017.
There is supposed to be a second SIGINT release, focusing on the P-11 smallsats.I'm surprised by the stuff they released on the Agena SIGINT satellites because there are some obvious things that they did not release. No photos of the satellites, for instance (there is a photo of the HARVESTER payload, and a poor quality photo of a satellite in an assembly room, but that's it). They also could have released a better redacted version of "The SIGINT Satellite Story." And the reproduction quality of the Butterworth history that they did release is poor. And nothing on the tactical use of the satellites in Vietnam (known as "PENDULUM"). There's good stuff in that release, but lots of omissions.
http://thespacereview.com/article/3394/1
Well back of envelope for 1' resolution 8 bit grey-scale (Black and White) on 1 mile squared is ~27 gig. Each Kh-9 Strip was ~380 miles long, so for each mile of coverage you are looking at maybe 10 TB uncompressed. With decent compression, maybe a 1/2 TB. It's jut mind boggling, 10 TB per mile.
If you go by this declassified diagram ( https://en.wikipedia.org/wiki/KH-9_Hexagon#/media/File:KH-9_HEXAGON_satellite_2.jpg ) each 120 degree strip was up to 300 nautical miles (NM) wide and 8.2 (NM) a nadir (center).So assuming sampling at 1 ft at nadir gives you something like (6076 pixel (1 NM = 6076 feet) x 8.2) x (6076 x 300) = 84 GB 8 bit raw bw (256 levels of grey) per strip with the 120 degree sweep. 30 degrees (using crude trig) should be 44 NM strip, 12 GB60 degrees (using crude trig) should be 95 NM strip, 27 GB90 degrees (using crude trig) should be 164 NM strip, 46 GBAgain, this all depends on:1. Your sampling rate -dropping from 1 ft to 2ft sampling will drop your memory requirements by a factor of 4!, -dropping from 1 ft to 4 ft, factor of 16)2. Bit depth -8 bits is standard, but lower bit depth could have been used, -again dropping memory requirements, -or higher, 12, 14 bit AtoD's are quite common in the imaging world)3. What compression , if any is used (high compression could drop these values by a factor of 10 or so). 4. None of these back of envelope calcs use color (multiply size by a factor of three).More fun, if memory serves, the film was 6" wide (0.5') and 310,000 feet long. That's (0.5 x 99646) x (310000 x 99646) = 1,400 TB for both reels.
Examples of the use of terabyte to describe data sizes in different fields are: Library data: The U.S. Library of Congress Web Capture team claims that as of March 2014 "the Library has collected about 525 terabytes of web archive data" and that it adds about 5 terabytes per month. Online databases: Ancestry.com claims approximately 600 TB of genealogical data with the inclusion of US Census data from 1790 to 1930. The CERN (European Organization for Nuclear Research) released 300 terabytes of data to the global science community in April 2016 from its latest science run on the Large Hadron Collider. It Involved just the last science run of the Compact Muon Solenoid Experiment, 1 of 4 large science instruments at the LHC facility. Computer hardware: Hitachi introduced the world's first one terabyte hard disk drive in 2007. Historical Internet traffic: In 1993, total Internet traffic amounted to approximately 100 TB for the year.[12] As of June 2008, Cisco Systems estimated Internet traffic at 160 TB/s (which, assuming to be statistically constant, comes to 5 zettabytes for the year).In other words, the amount of Internet traffic per second in 2008 exceeded all of the Internet traffic in 1993. Social networks: As of May 2009, Yahoo! Groups had "40 terabytes of data to index". Video: Released in 2009, the 3D animated film Monsters vs. Aliens used 100 TB of storage during development.[15] Usenet: In October 2000, the Deja News Usenet archive had stored over 500 million Usenet messages which used 1.5 TB of storage. Encyclopedia: In January 2010, the database of Wikipedia consists of a 5.87 terabyte SQL dataset. Climate science: In 2010, the German Climate Computing Centre (DKRZ) was generating 10000 TB of data per year, from a supercomputer with a 20 TB memory and 7000 TB disk space. Audio: One terabyte of audio recorded at CD quality contains approx. 2000 hours of audio. Additionally, one terabyte of compressed audio recorded at 128 kbit/s contains approx. 17,000 hours of audio. The Hubble Space Telescope has collected more than 45 terabytes of data in its first 20 years of observations. The IBM computer Watson, against which Jeopardy! contestants competed in February 2011, has 16 terabytes of RAM. 1 terabyte of data would require about 1428 CD-ROMs , 212 DVDs, or 40 single-layer Blu-ray Discs.
Amazing calculations, folks. The kind of things that make this forum such an amazing resource. I now wonder, did the KH-11 had some kind of internal storage capability ? a kind of orbital hard disk / RAM to store some photos ?
Quote from: Archibald on 12/21/2017 07:56 pmAmazing calculations, folks. The kind of things that make this forum such an amazing resource. I now wonder, did the KH-11 had some kind of internal storage capability ? a kind of orbital hard disk / RAM to store some photos ?It has to have some internal storage. There's no way that you'd want to build a system that would lose all the imagery if the comm link was not working.My next articles will be on ZOSTER/FROG and SDS.