X Report 25 Sep 2025
SpaceX continues to make strides with multiple launches, including 28 Starlink satellites and NASA's IMAP mission, highlighting its ongoing role in advancing space weather research.
EP 3 (11745)
COSPAR: 1980-019G | Alt Name: EP 3
DECAYED
Image
Additional Sources
Launch Details
Launch Date
March 3, 1980
Launch Site
AFWTR
Launch Pad
SLC3W
Launch Vehicle
Atlas F/MSD
Orbital Elements
NORAD ID
11745
International Designator
1980-019G
Decay Date
4/2/2021
Basic Satellite Info
Name
EP 3
Alternative Name
EP 3
Type
Payload
Status
Decayed
Owner
NRO/NRL
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
The satellite EP 3, also known by its OBJECT_ID 1980-019G and NORAD_CAT_ID 11745, is a US-built NOSS SSU (Navy Ocean Surveillance System Support Unit) with dimensions of 0.9 meters in length, 0.4 meters in diameter, and a span of 10 meters. Launched on March 3, 1980, from AFWTR Launch Site at SLC3W using an Atlas F/MSD launch vehicle, it has a dry mass of 200 kilograms and was manufactured by MM for the NRO/NRL. The satellite's primary payload is PARCAE 3 SSU 3, and its shape consists of a box with antennas attached. It reached a stable orbit on March 28, 1980.
Physical Characteristics
Length
0.9
Diameter
0.4
Span
10
Dry Mass
200
Launch Mass
200
Shape
Box + Ant
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
PARCAE 3 SSU 3
Purpose
Unknown
Mission
Unknown
Manufacturer
MM
Life Expectancy
Unknown
Bus
NOSS SSU
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
Space Brief 19 Feb 2025
Today's brief covers launches by SpaceX and mysterious Space Force missions, along with updates on Japan's moon lander and US-UAE defense deals.
Space Brief 27 Jun 2025
Today's Space Brief covers potential changes in the procurement strategies for the Space Force, developments in missile detection technology, and budgetary impacts on space programs.
X Report 21 Mar 2025
SpaceX achieves a historic rocket reuse milestone and successfully launches NRO satellites, alongside charming interactions during Crew-9 Dragon recovery.
X Report 4 Jul 2025
SpaceX continues to make strides in satellite deployment with a successful launch. The European Space Agency's new satellite enhances global atmospheric forecasting, showcasing the expanding role of launches in improving environmental monitoring.
SpaceX Wins $739M for Nine National Security Launches, FCC Adds 7,500 Starlink Sats | KeepTrack Space Brief
SpaceX awarded $739M for nine national security missions. FCC approves 7,500 additional Starlink satellites. NASA announces early Crew-11 return from ISS due to medical issue.
Version 10.0.0 Release Notes
The latest update introduces 3D satellite FOV cones, advanced sensor capabilities, and enhanced timelines, improving the way users interact with satellite data.
Space Brief 14 Apr 2025
Today's highlights include SpaceX's record-breaking Falcon launches, urgent warnings about orbital collisions, and a doubleheader launch featuring spy and Starlink satellites.