GPS IIF-1 over San Antonio tonight
Pass predictions for San Antonio, TX.
Next visible pass
Sun, Oct 25, 2:58 AM
Peak elevation 36.36° · rises SW · sets S
Tracking: GPS BIIF-1 (PRN 25) (NORAD 36585)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Oct 25 | 2:58 AM | 36.36° | SW | S |
| Oct 25 | 8:40 AM | 21.95° | SE | NE |
| Oct 25 | 11:30 PM | 50.59° | NW | S |
| Oct 26 | 8:36 AM | 21.97° | SE | NE |
| Oct 26 | 11:26 PM | 50.57° | NW | S |
| Oct 27 | 8:32 AM | 21.98° | SE | NE |
| Oct 27 | 11:22 PM | 50.55° | NW | S |
How to spot GPS IIF-1 from San Antonio
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 San Antonio.
Prefer email?
One email tonight before GPS IIF-1 is visible, never more than 2/week.