De-Orbit Instrument Package (Space Ball)

a small (<50 kg) autonomous space package to be robotically released from the International Space Station (ISS). It will consist of an instrument package, in addition to its on-board communications, position sensing (GPS), computer, power and attitude control systems.

Purpose: To gather and transmit atmospheric science, hypersonic aerodynamic or earth observation data over a period of approximately 1 month from a series orbits initially similar to ISS .

Basis:

Utilize ISS to provide launch platform for scientific, engineering, military and commercial observations.

Utilize STS vehicle to provide lower vibration level launch

Mission Description:

1. plan de-orbit trajectory to maximize data collection

2. transport space ball to ISS via STS and store till convenient release time

3. release space ball (with sufficient delta-V) to avoid ISS on subsequent orbits

4. monitor position with GPS and initiate data gathering based on mission requirements

5. (optional) limited latitude/speed control with deployment of aerodynamic surfaces

6. data transmitted to earth direct to ground station or via TDRSS connection (20-75 days: depends C_DA & deltaV)

7. as aerodynamic drag increases, space ball disintegrates

Development Stage:

Design Status: FE model to evaluate resonant frequencies; U.S. Patent 6,869,048

De-Orbit Instrument Package FE model