Navigation
GPS BIIRM-1 (PRN 17)
GPS Navigation Satellite (Block IIR-M) · US Space Force
Right now
LiveIt moves every second. See exactly where it is — worked out from its orbit, on your own device — on the live 3D globe.
- Over
- —
- Altitude
- —
- Speed
- —
GPS BIIRM-1 (PRN 17), launched in 2005, was the first fully modernized GPS satellite to reach an operational orbital slot, carrying both the jam-resistant military M-code and the civilian L2C signal. L2C's dual-frequency capability directly benefits ordinary users: a receiver that can compare timing on two separate frequencies can measure and cancel out ionospheric delay, the single largest source of GPS positioning error, cutting inaccuracy from meters down toward centimeters for capable receivers.
Its orbit
- Orbit
- Medium Earth Orbita high vantage point, ideal for navigation
- Altitude
- 12,333–12,758 mi (19,848–20,532 km)
- Inclination
- 54.8°
- One orbit
- 12.0 hours2.0 orbits a day
- NORAD ID
- 28874
- Int’l designator
- 2005-038A
- Launched
- 2005
Orbital elements from CelesTrak, as of 22 Sep 2026.
More navigation
- GPS BIIRM-2 (PRN 31)GPS Navigation Satellite (Block IIR-M)
- GPS BIIRM-3 (PRN 12)GPS Navigation Satellite (Block IIR-M)
- GPS BIIRM-4 (PRN 15)GPS Navigation Satellite (Block IIR-M)
- GPS BIIRM-5 (PRN 29)GPS Navigation Satellite (Block IIR-M)
- GPS BIIRM-6 (PRN 07)GPS Navigation Satellite (Block IIR-M)
- GPS BIIRM-8 (PRN 05)GPS Navigation Satellite (Block IIR-M, Final of Generation)