Small Mission Dispensed Payloads

Small mission dispensed payloads allow governments, scientific institutions, and organizations the benefit of frequent and reliable access to space with shorter lead times at lower costs than dedicated missions.

How Do Dispensed Payloads Work?

  • The dispensed payload is integrated with the host spacecraft 6 to 12 months before launch
  • The host carries the dispensed payload to the desired orbit (typically GTO or near-GEO)
  • The host spacecraft ejects the dispensed payload with a controlled, low-tumble-rate ejection
  • The dispensed payload clears the host, powers on, and commences operations


Dispensed Payloads: SSL Bus Available Utility

Parameter Available Utility on SSL 1300 Bus
Launch Frequency Four to eight opportunities available per year
Maximum Volume 1 m x 0.5 m 0.4 m (standard sizing)
1 m x 1 m x 0.4 m (extended sizing)
Maximum Mass 90 kg (standard sizing)
150 kg (extended sizing)
Center of Mass Within 15 cm of payload geometric center in any axis
Available Power 200+ W, 1.8 A @ 28-31 V
State During Launch Off
Data Connection MIL-STD-1553
Thermal Environment -35° C to +60° C non-operating + aerothermal heating during launch
Launch Dynamics Acoustic, static, vibration, shock envelope of common launch vehicles (Ariane 5, Proton, Falcon 9, Sea Launch)
Ejection Speed 0.25 m/sec
Maximum Tumble Rate 0.5 deg/sec/axis
Dispensing Orbits Available GTO (at apogee), near GEO (100-300 km sub or super)
Range Accuracy of Drop-Off 100 m
In-Track Accuracy 2 km
Release Point Accuracy 5 degrees/axis
Deployment Video Available