Between September 21 and October 10, 1959, a research program was carried out by the Aviation Medical Acceleration Laboratory to measure the effects of sustained acceleration on the pilot's ability to control a vehicle. Various side-arm controllers were used, and it appeared that the three-axis type (yaw, roll, and pitch) was the most satisfactory. Later this configuration was extensively evaluated and adopted for use in the control system of the Mercury spacecraft.

General Curtis E. LeMay, Vice Chief of Staff, USAF, informed Headquarters ARDC that the Secretary of Defense had assigned responsibility to the Air Force for developing and launching all military spacecraft. The Air Force was also to perform all required systems integration for military space systems. The decision was made for reasons of efficiency and economy.

As general manager of Radio Corporation of America's Major Defense Systems Division, Holmes had been project manager of the Ballistic Missile Early Warning System. Congressman G. P. Miller (D.-Calif.) succeeded the recently deceased Congressman Overton Brooks of Louisiana as chairman of the House Committee on Science and Astronautics.

Gemini extravehicular activity difficulties cause redesigned forward dome hatch in the S-IVB hydrogen tank. Prompted by recent operational difficulties involving extravehicular activity during Gemini flights IXA, X, and XI, Deputy Project Manager Kenneth S. Kleinknecht recommended to Saturn/Apollo Applications Program officials in Washington a redesigned forward dome hatch in the S-IVB hydrogen tank; i.e., one that could be more readily removed. He urged installing a flexible type of airlock seal prior to launch of the stage. These changes, Kleinknecht said, would go far toward minimizing astronaut workload for activating the spent stage once in orbit.

At the Fedosiya test range a Soyuz parachute test failed when the parachute hatch wouldn't jettison. This was due to an incorrectly inserted safing pin - it was not a spacecraft problem. So the Soyuz was still cleared for manned flight. Aboard Zond 5, the star tracker has completely failed. So the spacecraft will have to make a ballistic re-entry with splashdown in the Indian Ocean planned at 31 deg 58' S, 65 deg 21' E.

At 10:43 the Luna 16 ascent stage fires, thrusting the return capsule with the lunar soil toward the earth. It will land somewhere on Soviet territory within a 1500 km radius of Dzhezkazgan. The 25 cm diameter capsule is equipped with a 10 square meter parachute. It was thought that it would take 10 to 15 launches to perfect this system, but instead it has succeeded on the sixth attempt.

SAMSO signed a $24.1 million letter contract for two DMSP spacecraft (F-8 and F-9) and long lead parts for a third (F-10). The contract incorporated the toughest negative incentives ever inserted into a spacecraft contract up to that time. It was structured in that manner in obedience to new procurement guidelines issued by the AFSC commander, General Slay.

Carried Soviet/French magnetosphere and ionosphere experiments. Investigation of physical processes in the earth's magnetosphere and ionosphere, and study of the nature of polar aurorae. Carried scientific equipment developed by Soviet and French specialists under the joint Soviet-French project 'Arkad-3'.

Geostationary at 3.5 deg W. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit at 94 deg W in 1984-1995 As of 1 September 2001 located at 138.23 deg E drifting at 1.543 deg W per day. As of 2007 Mar 10 located at 125.04W drifting at 1.587W degrees per day.

Cosmos 2291 quickly moved to 80 degrees E, joining Cosmos 2085 as a replacement for Cosmos1961. Thus, at the end of 1994 the Potok constellation had been restored to its normal 4·sateellite complement: Cosmos 2085 and 2291 at 80 degrees E and Cosmos 1888 and 2172 at 13.5 degrees W. Cosmos 2291 continued at 80 deg E in 1994-1995; then it was moved to 14 deg W in 1995-1999 As of 6 September 2001 located at 62.64 deg W drifting at 0.324 deg W per day. As of 2007 Mar 10 located at 112.35W drifting at 0.417W degrees per day.

Chief Designer of Chinese rockets Long Lehao described China's three-phase future space launcher plan. Phase 1, 2001-2003: Modify existing launchers to increase their reliability and payload capacity. Phase 2, by 2005: Develop non-toxic, non-polluting launchers, and increase low-Earth-orbit launch capacity to over 20 tonnes and geosynchronous transfer orbit capacity from the current 5.5 tonnes to about 14 tonnes. Phase 3: Develop a recoverable launch vehicle with lower launch costs.

Launch attempt on September 20 scrubbed. The NOAA polar orbit weather satellite, an Advanced Tiros N with a suite of imaging and sounding instruments. The two-stage Titan II launch vehicle, serial 23G-13, put NOAA-L into a suborbital -2500 x 800 km x 98.0 deg trajectory. The spacecraft's Thiokol Star 37XFP solid motor fired at apogee to circularize the sun-synchronous orbit at 800 km.

Launch delayed from June 27, July 18/22, August 12/21 and September1. The Orbital Sciences Taurus 2110 failed to remain in orbit. A problem a few seconds after first stage separation caused the T6 rocket to go off course; the rocket recovered and the remainder of the stages fired, but final cutoff velocity was too low to reach a sustainable orbit. The Castor 120 zero stage was on course but the Orion 50S first stage motor went off course. The satellites separated from the final stage as planned but burned up in the earth's atmosphere northeast of Madagascar before completing the first orbit. The final orbit was about 75-80 km x 425-430 km x 97 deg. The primary payload was the OrbView-4 imaging satellite. OrbView-4, built by Orbital, was a 368 kg box-shaped spacecraft carrying a 1-m resolution panchromatic camera and an 8-m resolution 200-channel hyperspectral imager with a 0.45-meter aperture. It was to be used by the US Air Force.

The QuikTOMS satellite was a NASA-GSFC project carrying the TOMS-5 ozone mapper. QuikTOMS used a 168 kg double Microstar bus and was to have replaced TOMS instruments on a delayed Russian weather satellite and the failed ADEOS. The loss of QuikTOMS put a hole in NASA's attempts to monitor the ozone layer.

SBD, the Orbital Sciences' Special Bus Design. The 73 kg satellite was a test version of an enlarged Microstar bus. It would have remained attached to the third stage, together with two Celestis burial canisters containing cremated human remains, and an experimental third stage avionics box.

Although the antenna failed to deploy, NASA developed workarounds and the spacecraft cruised the Jovian system for eight years. Its propellant then depleted, it was maneuvered to enter the Jovian atmosphere on September 21, 2003, at 18:57 GMT. Entry was at 48.2 km/s from an orbit with a periapsis 9700 km below the 1-bar atmospheric layer. The spacecraft continued transmitting at least until it passed behind the limb of Jupiter at 1850:54 GMT, at which point it was 9283 km above the 1-bar level, surprising Galileo veterans who feared it might enter safemode due to the high radiation environment. On its farewell dive, it had crossed the orbit of Callisto at around 1100 on September 20, the orbit of Ganymede at around 0500 on September 21, Europa's orbit at about 1145, Io's orbit at about 1500, Amalthea's orbit at 1756, and the orbits of Adrastea and Metis at 1825. Galileo was destroyed to prevent the possibility that its orbit would eventually be perturbed in such a way that it would crash on and biologically contaminate Europa, which was considered a possible place to search for life. Light travel time from Jupiter to Earth was 52 min 20 sec at the time of impact, and the final signal reached Earth at 1943:14 GMT.

ISS resupply mission. The Dragon Trunk carried two packages, the ISS RapidScat radar scatterometer science instrument and the RapidScat Nadir Adapter, which was to be installed on the SDX nadir attach point of the Columbus module's external payload facility. The Dragon cabin carried SpinSat, an 0.56m spherical NRL satellite to be deployed by the Kibo JEM-RMS, and the NASA-Ames Rodent Research 1 life sciences payload with 20 mice. The SSRMS Canadarm-2 grappled the Dragon at 10:52 GMT on September 23 and berthed it to the Harmony node at 13:21 GMT. Unberthed and released by the SSRMS at 13:57 GMT on 25 October. It made its deorbit burn at 18:43 GMT and splashed down in the Pacific Ocean at 19:38 GMT off Baja California near 34 deg N x 123.5 deg W.