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Surrey Satellite Technology Ltd (SSTL) plans to fly a dedicated satellite for hosted payloads in 2015. This OTB (Orbital Test Bed) satellite will provide the opportunity for Surrey’s Hosted Payload customers to benefit from reliable, low-risk access to orbit, to rapidly and cost-effectively space-qualify new technology, gain flight heritage, acquire mission experience, generate in-orbit data and provide mission continuity capability, without the need to procure a costly dedicated launch.

OTB 1 is based on the SSTL-150 bus and The mission is planned to last five years.

One of the hosted payloads is NASA's DSAC (Deep Space Atomic Clock), a technology demonstration mission with the goal to validate a miniaturized, ultra-precise mercury-ion atomic clock that is 100 times more stable than today’s best navigation clocks.

Also on board is a small capsule with cremated human remains for Celestis, called "Heriatge Flight".

A second mission called OTB 2 is planned for a later date.

Nation: UK
Type / Application: Technology
Operator: SSTL
Contractors: SSTL
Configuration: SSTL-150
Power: 4 deployable fixed solar arrays, batteries
Lifetime: 5 years
Mass: 138 kg
Satellite COSPAR Date LS Launch Vehicle Remarks
OTB 1 2019-036C 25.06.2019 CCK LC-39A Falcon-Heavy (Block 5) with DSX , FORMOSAT 7A, 7B, 7C, 7D, 7E, 7F, GPIM, NPSat 1, Oculus-ASR, Prox 1, LightSail 2, ARMADILLO, FalconSat 7, E-TBEx A, E-TBEx B, PSat 2, BRICSat 2, Prometheus 2.6, TEPCE 1, 2, CP 9 (LEO), StangSat
OTB 2 - 201x with ?