Our Services
Advanced Propellant Management Solutions
Propellant Estimations
We use thermal gauging methods with on-orbit telemetry and validated thermal models to estimate current propellant load. The method is applicable to mono- and bipropellant systems across diverse PMDs (vanes, diaphragms, central posts, and more), and can independently gauge tanks in multi-tank systems regardless of separation-valve configuration.
Accuracy of the method increases over mission life, enabling high-confidence end-of-life assessments. Results include full error analysis and an estimate of remaining operational life.
Thermal Gauging Method (TGM)
The Thermal Gauging Method (TGM) for propellant estimation is based on the measurement of the thermal capacitance of a tank containing liquid propellant and pressurant. By measuring the thermal response of the propellant tank to heating and comparing the observed temperature rise to simulation results TGM is able to determine accurate propellant load.
The biggest advantage of TGM over other methods is that its accuracy greatly improves towards the end of mission life.
Thermal Design Support
We provide specialized thermal design support to customize propellant tanks for improved accuracy of thermal propellant gauging—making the tank more “thermal gauging friendly.”
Our Support Includes
- Determining overall heater requirements
- Defining optimal heater placement
- Identifying temperature sensor locations and specifications
- Selecting optimal positions for spot heaters
De-Orbiting Planning
YSPM provides Active Propellant Management (APM) tools to prevent accidental tank depletion, ensuring comprehensive support for end-of-life strategies. By accurately determining the true usable propellant load available, the system facilitates reliable de-orbit implementation. Additionally, YSPM develops strategies for optimized propellant and cold gas utilization to maximize orbit-raising capability.
End-of-Life Strategy Support
We provide Active Propellant Management (APM) tools to prevent accidental tank depletion in multi-tank propulsion systems—especially critical at end-of-life when propellant levels in individual tanks are very low.
Usable Propellant Determination
In multi-tank or bi-propellant propulsion systems, the propellant actually available for de-orbit maneuvers may be significantly less than the simple sum of all tank loads. We accurately determine the true usable propellant load for reliable de-orbit planning.
Optimized Propellant and Cold Gas Utilization
We develop strategies to leverage both residual propellant and cold gas, maximizing orbit-raising capability and ensuring safe and effective end-of-life maneuvers.