PharmaSat

PharmaSat

File:330070main PreSat Assembly 428-321.jpg PharmaSat undergoing preflight testing
Mission type	Biological research
Operator	NASA
COSPAR ID	2009-028B
SATCAT №	35002
Website	PharmaSat
Mission duration	> 21 Days 96 hr Main Experiment.
Spacecraft properties
Manufacturer	NASA
Launch mass	5.5 kilograms (12 lb)
Start of mission
Launch date	May 19, 2009, 23:55 (2009-05-19UTC23:55Z) UTC
Rocket	Minotaur I
Launch site	MARS LP-0B
Contractor	Orbital Sciences
End of mission
Decay date	August 14, 2012
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee	428 kilometres (266 mi)
Apogee	466 kilometres (290 mi)
Inclination	40.4 degrees
Period	93.52 minutes
Epoch	May 22, 2009

PharmaSat was a nanosatellite developed by NASA Ames Research Center which measured the influence of microgravity upon yeast resistance to an antifungal agent. As a follow on to the GeneSat-1 mission, the Ames Small Spacecraft Division conducted the PharmaSat mission in collaboration with industry and local universities.

PharmaSat was the first nanosatellite to implement biological science guided by its Principal Investigator. The mission was designed to aid the development of medicines or techniques to enable long-term manned space travel and habitation.

Background

The PharmaSat mission builds upon technology demonstrated by GeneSat-1, which used a CubeSat to study microfluidics and optics in the space environment. It was designed to provide life-support, growth, monitoring, and analysis capabilities for microorganisms.

Based, like GeneSat-1, around a three-unit CubeSat platform; PharmaSat was designed to accomplish five functions in an autonomous free-flying platform:

1. Provide life support and environmental control for growth of the yeast strain in 48 independent microwells
2. Dose the growing yeast with antifungal agent at the appropriate point on the growth curve with three distinct, well-defined dosage levels, plus a zero-dose control
3. Track the population of the yeast via optical density of each microwell before, during and after antifungal administration
4. Determine well-by-well yeast viability at multiple, well-defined times after antifungal administration using a colorimetric reagent, Alamar Blue
5. Telemeter the resulting population and viability data to Earth, along with system status data.

Operations

PharmaSat was launched at 23:55 UTC on May 19, 2009 aboard a Minotaur I rocket from Pad 0B at the Mid-Atlantic Regional Spaceport on Wallops Island. PharmaSat was flown as a secondary payload co-manifested with the US Air Force Research Laboratory's TacSat-3 spacecraft.

PharmaSat was successfully inserted into a low Earth orbit at approximately 459 kilometres (285 mi) above the Earth, following which it was activated and began transmitting radio signals to two ground control stations. The primary ground station at SRI International in Menlo Park, California, transmitted mission data from the satellite to its operators, while a second station was located at Santa Clara University, whose Robotic Systems Laboratory was responsible for operating the satellite.

After establishing contact the satellite was commanded to initiate its experiment, which lasted 96 hours. Once the experiment began, PharmaSat relayed data in near real-time for up to six months. PharmaSat also carried an amateur radio beacon, with a frequency of 437.465 megahertz, which broadcast spacecraft telemetry. Amateur radio operators were asked to collect data from the spacecraft and provide it to the operators via the Mission Dashboard website.

PharmaSat decayed from orbit and reentered the atmosphere on 14 August 2012.

See also

• List of CubeSats