One of the primary research outputs of the Space Science and Technology Centre (SSTC) at Curtin University has been its study of extra-terrestrial samples. The Centre has recovered meteorites for research using its custom designed and built Desert Fireball Network (DFN), and acquired asteroid samples from collaborations with international space agencies who have performed sample return missions such as CNSA (Chang’e 5) and JAXA (Hayabusa 2). Of these two sample collection methods, the latter is preferable due to the protection provided in the re-entry process. However, the cost of these missions is many times greater than the cost of operating the DFN. As a long-term objective, and as part of the SSTCs new Binar Space Program (BSP), the Centre is researching new ways to perform sample return missions. One of the major phases of these missions is the Entry, Descent, and Landing (EDL). Currently under investigation at the BSP are methods for performing this process on a CubeSat platform. The first part of the EDL phase, re-entry for the case of the Earth, is being developed and planned for testing on the next Binar missions. In order to verify these systems a global communications system is necessary to maximise availability of the data link. The proposed solution is to use the LEO constellations of Iridium and Globalstar to communicate final location data before the satellite enters the atmosphere and burns up. This presentation will provide the results of an initial analysis into the effectiveness of a combined LEO constellation communication system, specifically targeting communication gap times in order to determine the accuracy of the predicted re-entry location. Due to the current extensive use of these constellations for CubeSat communications, this presentation will also show how the use of combining both systems are beneficial for other missions, including missions which require high availability communications in LEO.