Goddard achieves the second flight of a liquid-propellant rocket. In air 4.2 sec; landed 50 ft from testing stand. References: 482 .

NACA flight 3. Mach 0.85 at 9150 m. Damping characteristics good; number 1 cylinder failed to fire. References: 49 , 97 .

Decree 'On creation of OKB-1 branch at Progress Plant' was issued. References: 474 .

Decree 'On approval for launch of Vostok' was issued. References: 474 .

Charles W. Frick resigned as ASPO Manager and Robert O. Piland was named Acting ASPO Manager. References: 16 .

Atmospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). References: 1 , 2 , 5 , 6 .

Carried SNAP-9A nuclear power source. The on-board nuclear reactor provided electrical power for a 1 kgf ion engine. Telemetry failed. References: 1 , 2 , 5 , 6 , 278 .

Failed. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). References: 1 , 2 , 5 , 6 , 278 .

Maximum Speed - 732 kph. Maximum Altitude - 13720 m. Flight Time - 242 sec. References: 49 , 97 .

Area survey photo reconnaissance satellite. References: 1 , 2 , 6 , 93 .

Area survey photo reconnaissance satellite; returned film capsule. References: 1 , 2 , 6 .

High resolution photo reconnaissance satellite; returned film capsule; maneuverable. References: 1 , 2 , 6 .

Studies were conducted to determine the feasibility of conducting a controlled deorbit of the Orbital Workshop. Three methods were considered: (l) using the CSM service propulsion system; (2) using the CSM reaction control system; and (3) implementing an S-II (Saturn V second stage) deorbit. The service propulsion system deorbit was assessed as not feasible; the reaction control system deorbit was considered technically feasible but, like the service propulsion system, it had an inherent program and crew safety risk associated with it. Implementation of an S-II deorbit would have serious time and cost impacts on the program. A 1970 study, which indicated that the probability of damage from the deorbiting Skylab was so small that changes which caused major impact in cost and schedule were not worth pursuing, was confirmed.

The first flight of the Almaz manned military space station. In January 1973 the first Almaz OPS was delivered to Baikonur. Launch and initial orbital checkout went according to plan. But before a crew could be launched the station depressurized. It was concluded that a short in electrical equipment started a fire in pressure vessel, leading to rupture of hull and depressurization. An alternate theory was that debris from an explosion of the third stage of Proton penetrated the hull. Control was lost on April 25, 1973, and the OPS cased operations on 29 April. Decayed May 28, 1973. Initial crew was to have been Popovich and Artyukhin.
Officially: Testing of improved design, on-board systems and equipment; conduct of scientific and technical research and experiments. References: 1 , 2 , 5 , 6 , 67 , 274 .

Unmanned Soyuz test flight. Recovered April 13, 1974 5:05 GMT. Soyuz ASTP Test.
Maneuver Summary:
190km X 309km orbit to 190km X 266km orbit. Delta V: 12 m/s
190km X 266km orbit to 240km X 300km orbit. Delta V: 23 m/s
240km X 300km orbit to 258km X 274km orbit. Delta V: 12 m/s
Total Delta V: 47 m/s.
Officially: Investigation of the upper atmosphere and outer space. References: 1 , 2 , 6 .

Complete assembly and deliver MPTA structure on dock, Lockheed test site, Palmdale References: 15 .

ASAT target for Cosmos 1174 interceptor. First in a series of tests to validate functioning of system after extended storage. References: 1 , 2 , 5 , 6 , 272 .

Manned three crew. Docked with Salyut 7.Transported a Soviet-Indian international crew comprising ship's commander Y V Malyshev, flight engineer G M Strekalov (USSR) and cosmonaut-researcher R Sharma (India) to the SALYUT-7 orbital station to conduct scientific and technical studies and experiments. Returned crew of Soyuz T-10 to Earth. Recovered October 2, 1984 10:57 GMT. References: 1 , 2 , 6 , 32 , 33 , 51 .

Military cartographic satellite; returned film capsule. References: 1 , 2 , 6 .

Communication experiments. References: 1 , 2 , 5 , 6 .

High resolution photo reconnaissance mission. References: 279 .

Commercial communications testbed. Plane F. Ascending node 199.1 degrees. References: 2 , 5 , 6 .

Commercial communications testbed. Plane F. Ascending node 198.5 degrees. References: 2 , 5 , 6 .

Lightning mapper; GPS radio occultation. References: 2 , 5 , 6 .

Microgravity experiments.

Geostationary at 64.1E. Launch vehicle put payload into geosynchronous transfer orbit with RAAN Cntl trajectory option. References: 4 , 6 , 278 .