The engine runs for 5 seconds before exploding, producing a thrust of 719 kgf. A second test the following day produces 650 kgf for only four seconds before exploding. Thermal transfer from the engine to the missile structure is found to be the cause, and changes are made.

At least 11 V-2 rockets were fired at the bridge across the Rhine at Remagen, which had been captured by American forces. The missiles missed the aiming point by as much as 40 km, but one did explode 300 metres from the bridge, killing 3 American soldiers. Launched from Zwolle-Hellendoorn-Enchede launch area.

Cosmic radiation, magnetic field research. Reached 104.6 km. Launched from from vessel ACM1 at Atlantic Ocean Launch Site 1-1 - Latitude: 10.80 S, Longitude:89.23 W.

Single-stage, air-launched rocket research vehicle exceeded Mach 5 in NACA Lewis Laboratory flight test.

Council of Soviet Ministers (SM) Decree 'On selection of launch area for the R-7, 40 Buran, and 350 Burya' was issued.

The NACA Special Committee on Space Technology held its second meeting at the Ames Aeronautical Laboratory, and preliminary reports were presented by the committee working groups on objectives and vehicular programs. The committee as a whole was briefed on the work that had been accomplished by the former NACA Committee on Aerodynamics over the past 6 years. It was stated that between 1952 and 1956, approximately 10 percent of NACA's research efforts were applicable directly or indirectly to astronautics. In 1957, the percentage of space flight research rose to 23; and at the time of the meeting, 30 percent of the aerodynamic effort and 20 percent of propulsion research was applicable to astronautics problems. The committee also heard special papers on research being conducted in fluid mechanics, satellite studies, spacecraft design proposals, boost-glide and hypersonic vehicle studies, and missiles.

Transmitted pear-shaped earth data. Life expectancy of perhaps a 1,000 years. The satellite had a mass of 1.6 kg and a diameter of 175 cm.

First flight launching of a spin-stabilized 20-inch-diameter spherical rocket, by NASA Langley's PARD at Wallops Station, Va.

First test flight serial production model.

VANGUARD I still in orbit and transmitting on its second anniversary after traveling 131,318,211 miles. NASA reported that VANGUARD I orbit was being altered by solar pressure.

Maximum Speed - 2283 kph. Maximum Altitude - 16045 m. 6G maneuver test.

Vanguard I completed third year in orbit and was still transmitting. Vanguard I provided much useful data on orbits, including the slight pear-shape of the Earth and the effect of solar pressure. Vanguard also provided the second stage for the Able, Delta, and Able-Star, as well as the third stage of Scout, pioneering solid-propellant stages used in Polaris and Minuteman.

Area survey photo reconnaissance satellite.

Last of three suborbital flight tests of the FOBS system. The second stage of the booster placed the third stage and dummy warhead on a depressed trajectory with a range of 8500 km but an altitude of only 220 km (versus 800 to 1200 km for an optimum ballistic trajectory). The third stage than executed a 180 degree turn and its engines were fired to further brake the warhead to an impact on the Kamchatka peninsula. The second stage meanwhile continued on to reentry over the Pacific Ocean.

AFWTR assumed operational control of the range Instrumentation Ship, Vanguard

FU174 Solar corona (UV) / Ptr mission.

Follow-on operational missile test

Launched from Arecibo, Vega Baja, Puerto Rico - Latitude: 18.50 N - Longitude: 66.73 W.

Launched from Arecibo, Vega Baja, Puerto Rico - Latitude: 18.50 N - Longitude: 66.73 W.

Launched from Arecibo, Vega Baja, Puerto Rico - Latitude: 18.50 N - Longitude: 66.73 W.

Launched from Arecibo, Vega Baja, Puerto Rico - Latitude: 18.50 N - Longitude: 66.73 W.

Launched from Arecibo, Vega Baja, Puerto Rico - Latitude: 18.50 N - Longitude: 66.73 W.

There is a management shuffle in the VVS head shed. Vershinin, a good supporter of Kamanin's attempts to obtain more VVS control of the space programme, is finished.

Investigation of the upper atmosphere and outer space.

Acquisition of meteorological information needed for use by the weather service.

The crews, station, and Soyuz spacecraft are all ready.

Solar eclipse observations.

KH-8 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

Complete premate MPTA test structure, Downey, and deliver to Palmdale

Area survey photo reconnaissance satellite; returned film capsule; separated science capsule.

Area survey photo reconnaissance satellite; returned film capsule.

Space shuttle main engine 2005, first flight engine delivered to NSTL for acceptance test firings

Civilian naval navigation satellite.

Photo surveillance; returned film capsule.

Photo surveillance; returned film capsule; maneuverable.

Indian remote sensing; 1st Soviet commercial launch. Indian Remote Sensing Satellite (IRS-1A). Operational remote sensing of the Earth for natural resources management applications. Also registered by the USSR as object no. 2387 in ST/SG/SER.E/182 and orbital parameters 102.7 min, 863 x 917 km x 99.01 deg.

Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network.

Mir Expedition EO-11. Joint flight with Germany. Docked at the Kvant rear port at 12:33 GMT on March 19.

This space object is intended for assignments on behalf of the Ministry of Defense of the Russian Federation. High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission.

First commercial flight of Rokot booster. Launch delayed from November 23-30, 2001, February 27, March 15 and 16. The Briz-KM upper stage ignited 5 minutes after launch and after a ten minute burn reached a 300 x 500 km orbit at about 0936 UTC. A second burn at 1042 UTC placed the satellites in a 483 x 506 km x 89 deg orbit; the two GRACE gravimetric satellites separated from the dispenser at 1047 UTC. A third Briz burn then lowered the rocket stage orbit to 146 x 487 km x 89 deg so that it would reenter quickly.

Gravimetry, Climatology first commercial flight delayed from November23-30, 2001, February27, March15 and 16.

SLBM Test

SLBM Test