GPS IIF-1 over Washington tonight
Pass predictions for Washington, DC.
Next visible pass
Sun, Oct 25, 9:11 AM
Peak elevation 44.09° · rises SE · sets NE
Tracking: GPS BIIF-1 (PRN 25) (NORAD 36585)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Oct 25 | 9:11 AM | 44.09° | SE | NE |
| Oct 26 | 12:42 AM | 31.22° | NW | SW |
| Oct 26 | 9:06 AM | 44.11° | SE | NE |
| Oct 27 | 12:38 AM | 31.20° | NW | SW |
| Oct 27 | 9:02 AM | 44.13° | SE | NE |
| Oct 28 | 12:34 AM | 31.18° | NW | SW |
| Oct 28 | 8:58 AM | 44.15° | SE | NE |
How to spot GPS IIF-1 from Washington
GPS navigation satellite in MEO at ~20,200 km — visible with binoculars in the right window.
- Look in the direction listed — passes start near the horizon and arc across the sky.
- Peak elevation matters — a 60°+ peak means it'll go nearly overhead; under 30° stays low.
- Best viewing is in the 90 minutes after sunset or before sunrise — the satellite is sunlit while you're in shadow.
- No equipment needed for bright passes — the ISS at peak rivals Venus.
Going to look up?
For fainter satellites you'll want 7×50 or 10×50 binoculars. A pair of Celestron SkyMaster binoculars is the consensus pick. Affiliate placement — replace with your affiliate link.
Pass alerts on your phone
Browser push, no email needed. We'll notify you 30 minutes before GPS IIF-1 is visible from Washington.
Prefer email?
One email tonight before GPS IIF-1 is visible, never more than 2/week.