Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

USA 227

retired

CommunicationsGEOCOSPAR 2011-011ALaunched 3/11/2011

Mission & Launch

Launch Mission: USA 227 [SDS17]
Launch Vehicle: Delta 4M+(4,2)
Launch Date: 3/11/2011
Last Contact: 1/1/2021

Orbit & Mass

Orbit Class: GEO
Altitude: 35,790 km
Inclination: 0 deg
Dry Mass: 2,500 kg
Total Mass: 3,000 kg

Payload Classification

Mission Type: Communications
Payload Category: COM*
Payload Class: D

Organizations

Operator: U.S. National Reconnaissance Office (NRO)
Manufacturer: Boeing

Constellation

Name: Satellite Data System
Active Satellites: 6

Registry

COSPAR ID: 2011-011A
UN Registration: ST/SG/SER.E/625