Documents / Official release
This Defense Intelligence Reference Document (DIA-08-1011-001), dated 1 November 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office under the Advanced Aerospace Weapon System Applications program. It covers nanosatellite technologies, laser Lightcraft propulsion, a weapon mission selection study and a multi-megawatt laser study. The author recommends that the Department of Defense, working with NASA, bring laser Lightcraft propulsion research back to the United States and restart the Air Force X-50LR test flight program.
From the source:Release of 2026-09-18 Incident: 11/1/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines laser-propelled “Lightcraft” as a possible low-cost method to launch very small satellites into low Earth orbit by using a remote high-energy laser to supply most of the propulsion energy rather than relying entirely on onboard energy sources. The report combines a survey of nanosatellite trends with a review of “Lightcraft” propulsion concepts, vehicle design, beam-control requirements, and mission studies, and argues that the most promising application is the launch of nano- or pico-satellites, especially Earth- and space-observing payloads of a few kilograms or less. It presents the concept as potentially much cheaper than conventional multistage rockets for very small payloads, while also noting significant practical constraints including strict beam-riding geometry, atmospheric losses, demanding pointing and adaptive-optics requirements, and heavy dependence on large ground-, sea-, or air-based laser infrastructure. Overall, the document presents laser “Lightcraft” as a technically plausible launch concept whose attractiveness depends on whether the supporting laser and beam-control system can be made reliable and economical at operational scale.
“Low Earth orbit”8 pages
UNCLASSIFIED//rOR: orrlCIAE USE 014Lf pushbroom scanning mode for complete Earth coverage rather than only sampling coverage. The constellation/array implementation is similar to that of the preceding concept (High Resolution Surface Sampling Radiometry section), except that tethers hold a receiving array that must be 2 km long to obtain the 1,200 km instantaneous swath width with a resolution of 100 m. It consists of a 2 km long focal surface with 12,000 printed dipoles, shaped into a focal surface by gravity gradient forces balanced against magnetic forces from a superconducting conductor around its periphery, acting on a piezoelectric, electron beam-shaped, adaptive membrane substrate. The large antenna is formed by a swarm of tiny elements making up the lens of a space-fed array. The antenna is a 4 km x 6 km diameter, sparse, self-cohering array formed from 12,000 picosats weighing 23 grams each, rotating in relative coordinates in a plane around a central orbit point. The picosats are similar to those of the preceding concept (High Resolution Surface Sampling Radiometry section). Their locations are initially selected to lie in a plane, and their spacings are pseudorandom to minimize the sidelobe levels, with each picosat designed to loosely stationkeep inside a box 10 m on a side. The relative positions of these picosat elements changes slowly, and only small and infrequent stationkeeping propulsive maneuvers are needed for constellation maintenance. The effective collecting aperture of the array is the sum of those of the picosats, and in this concept, equal to that of an equivalent 6 m diameter antenna at 2 GHz . However, the coverage spot diameter is set by the total aperture diameter of 4 km x 6 km, and thus is 100 m at 2 GHz from a 4,000 km orbit. Five constellation/arrays would produce 100% global coverage with 5 hour revisit for time critical measurements. The entire constellation weighs 3,000 kg, but that could be reduced in the future to 30 kg if Buckytubes are used to construct the system. ROTATING NANOSAT SWARM DISTRIBUTED RADAR An extremely powerful space-based radar, this concept would allow detection of most air, land, sea, and space targets, as well as many "low observable" targets anywhere, with one or a few constellations in GEO. A large, sparse array antenna using a swarm of nanosats creates a space-based radar system. The constellation/array implementation is similar to that of the preceding rotating swarm concepts, except that it generates and radiates extremely large peak and average powers, and given the generally high angles of viewing can detect and track many air, space, and surface targets from GEO. The constellation is composed of 10,000 nanosats that are self-contained repeater spacecraft weighing about 1 kg each. Each nanosat receives the ground signal, digitizes, delays, and retransmits it, causing it to arrive at the feeds at the same time as a direct ray through the center of the array. The time delay of each nanosat is self computed based on its location in the swarm, as measured by a loca l DGPS-like navigation signal, to compensate for its deviation from its assigned ideal location. Commands for beam sweep delays are superimposed on the time delays of each nanosat. Each nanosat generates 10 W of average power and 10 kW peak power at UNCLASSIFIED//FOR 061ilCl.li.k W&& 8Ptl'l 39
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 77 pages are in the text index: search them above, or from the library's search.