ESP-1
The first of the External Stowage Platforms, called ESP-1, was installed on the port side trunnion pin on the outer hull of the Destiny Laboratory Module on March 13, 2001 during the second EVA of the STS-102 Space Shuttle mission. It is powered by the Unity Module and has two attach points to store ORUs. ESP-1 was carried into orbit on the underside of an Integrated Cargo Carrier, and is smaller and unique in shape over the other ESPs and ELCs, with dimensions approximately 0.46 m wide by 2.4 m long.
ESP-1 holds the following ORUs:
- FRAM-1 Pump flow control system (PFCS) added by the STS-102 crew
- FRAM-2 Direct-current switching unit (DCSU) added by STS-100 crew
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ESP-1 and hardware installation locations on the Destiny during STS-102
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ESP-1 attached to the Destiny portside trunnion pin, PFCS on the left
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Another view of ESP-1
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PFCS attach points
Read more about this topic: External Stowage Platform