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LDPE 1

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Technology DemonstrationGEOCOSPAR 2021-118BLaunched 12/7/2021

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Mission & Launch

Launch Mission: STP-3
Launch Vehicle: Atlas V 551 G
Launch Date: 12/7/2021

Orbit & Mass

Orbit Class: GEO
Altitude: 35,518.5 km
Inclination: 0.13 deg
Dry Mass: 500 kg
Total Mass: 500 kg

Payload Classification

Mission Type

Technology Demonstration

Payload Category

TECH

Payload Class

Organizations

Operator: Air Force Research Lab (AFRL)
Manufacturer: Northrop Grumman

Registry

COSPAR ID: 2021-118B
UN Registration: ST/SG/SER.E/1041

Track

Mentions

All verified mentions of this spacecraft in source documents.

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The Northrop Grumman-built LDPE-1 launched aboard the STP-3 mission in December 2021.

GeneralPlanValue 4.0Jan 25, 2023Northrop Grumman-built Satellite Successfully Launched to Support US Space Force National Security Mission

Northrop Grumman built LDPE-1, which launched aboard the STP-3 mission in December 2021.

CapabilityPlanValue 4.0Jan 17, 2023Northrop Grumman-built LDPE-3A Satellite to Support US Space Force National Security Mission

The Northrop Grumman-built LDPE-1 launched aboard the STP-3 mission in December 2021.

GeneralPlanCapabilityValue 3.8Jan 16, 2023UPDATE 1: SpaceX sends Northrop Grumman’s USSF-67 two satellite mission to orbit via a Falcon Heavy — Northrop Grumman comments

LDPE-1 was launched aboard the STP-3 mission in December 2021.

PlanValue 4.0Nov 10, 2022Northrop Grumman Supports Successful Launch and Deployment of USSF-44 Mission

LDPE-1 launched aboard the Space Test Program mission on 2021-12-07.

PlanGeneralValue 3.5Nov 1, 2022SpaceX Falcon Heavy launches first U.S. national security mission

LDPE-1 launched aboard the STP-3 mission on 2021-12-07.

PlanValue 4.0Nov 1, 2022SSC’s USSF-44 payload aboard a SpaceX Falcon Heavy is successfully launched to orbit

LDPE-1 hosted six U.S. Space Force experiments focused on space weather and situational awareness on the STP-3 mission.

CapabilityGeneralValue 4.0Dec 7, 2021ULA launches STP-3 mission with national security and NASA payloads

Both the STPSat-6 and LDPE-1 spacecraft were built by Northrop Grumman.

CapabilityRelationshipsValue 4.0Dec 7, 2021ULA launches STP-3 mission with national security and NASA payloads

The secondary payload was the Long Duration Propulsive ESPA (LDPE-1), a small-satellite adapter ring designed to deploy military experiments.

CapabilityValue 4.0Dec 7, 2021ULA launches STP-3 mission with national security and NASA payloads

Space Systems Command’s Rapid Prototyping Division manages the LDPE program with a matrixed LDPE-1 team composed of Los Angeles Air Force Base and Kirtland Air Force Base personnel.

GeneralGovernanceValue 2.8Nov 22, 2021Space Systems Command’s STP-3 Satellites Now Encapsulated Aboard ULA’s Atlas V 551 Launch Vehicle At Cape Canaveral AFS

LDPE-1 is scheduled to launch in 2021 with the Space Test Program 3 mission.

PlanValue 4.0Jul 6, 2021Northrop Grumman Delivers A Star Of A Bus To L3Harris For Air Force’s NTS-3 Mission