Engineering Commons^™

The Differences Are Not So Great: High Altitude Balloon And Small Spacecraft Software Development, Jeremy Straub, Ronald Marsh

Jeremy Straub

Previous work discussed critical differences in planning, developing hardware for and executing a high altitude balloon (HAB) mission. One area where this difference is less pronounced is in software development, allowing HABs to be utilized as a ‘software testbed’ for many orbital missions. This paper provides an overview of the software development process for both orbital and HAB craft, highlighting differences between the two processes and the numerous similarities. It concludes by presenting a framework for analyzing the suitability of HAB testing for small satellite software.

A Low-Cost Gps/Inertial Position Determination System For High Altitude Balloons, Spacecraft And Unmanned Aerial Systems, Tyler Leben, Jeremy Straub, Ronald Marsh

Jeremy Straub

A low-cost system is needed to determine precise position and predict future location in flight and low-Earth orbit. One method to accomplish this task is to utilize an onboard GPS receiver. GPS units receive data from the GPS NAVSTAR constellation of 24 satellites in the form of a 37 byte ASCII text sent at 4800 baud called NMEA sentences. The standard is 1 HZ, which is one sentence per second, but can be more. Ideally, from this data a PVT (position, velocity, time) and altitude can be determined. This data is then transferred from the GPS module to a separate …

The Use Of Solar Balloons At Und As A Low-Cost Alternative To Helium Balloons For Small Spacecraft Testing And Stem Education, John Nordlie, Jeremy Straub, Chris Theisen, Ronald Marsh

Jeremy Straub

Helium-filled latex weather balloons have been utilized for many years to carry small satellite prototypes and subsystems into the stratosphere to allow testing in a “near space” (stratospheric) environment. A variety of environmental factors similar to the space environment can be found in this region, such as a rarified atmosphere, increased thermal stress including very low temperatures, increased solar radiation, the necessity of remote command and control, tracking, and telemetering of data. While this method of flight testing has been well-proven, a recent increase in the price of helium has driven the cost of such test programs to much higher …

Solar Ballooning: A Low-Cost Alternative To Helium Balloons For Small Spacecraft Testing, John Nordlie, Jeremy Straub, Chris Theisen, Ronald Marsh

Jeremy Straub

Helium-filled latex weather balloons have been utilized to carry small satellite prototypes and subsystems into the stratosphere to allow testing in a “near space” environment. This provides a variety of environmental factors similar to the space environment, such as a rarified atmosphere, increased thermal stress, increased solar radiation, the necessity of remote command and control, tracking, and telemetering of data. While this method of flight testing has been well-proven, a recent spike in the price of helium has driven the cost of such test programs to much higher levels. In this poster, an alternative technology to provide the flight mechanism, …

Enabling Interplanetary Small Spacecraft Science Missions With Model Based Data Analysis, Jeremy Straub

Jeremy Straub

Small spacecraft operating outside of Earth orbit are significantly constrained by the communica- tions link available to them. This is particularly true for stand-alone craft that must rely on their own antenna and transmission systems (for which gain and available power generation are limited by form factor); it is also applicable to ‘hitchhiker’-style missions which may be able to utilize (quite likely very limited amounts of) time on the primary spacecraft’s communications equip- ment for long-haul transmission.

This poster presents the adaptation of the Model-Based Transmission Reduction (MBTR) frame- work’s Model-Based Data Analysis (MBDA) component for use on an interplanetary …