GPS IIF-1 over Tokyo tonight
Pass predictions for Tokyo, JP.
Next visible pass
Sun, Oct 25, 11:56 AM
Peak elevation 81.16° · rises S · sets NE
Tracking: GPS BIIF-1 (PRN 25) (NORAD 36585)
7-day pass forecast
| Date | Time | Peak elev | Rises | Sets |
|---|---|---|---|---|
| Oct 25 | 11:56 AM | 81.16° | S | NE |
| Oct 26 | 9:39 AM | 81.19° | S | NE |
| Oct 27 | 9:35 AM | 81.21° | S | NE |
| Oct 28 | 9:31 AM | 81.23° | S | NE |
| Oct 29 | 9:27 AM | 81.24° | S | NE |
| Oct 30 | 9:23 AM | 81.26° | S | NE |
| Oct 31 | 9:19 AM | 81.28° | S | NE |
How to spot GPS IIF-1 from Tokyo
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 Tokyo.
Prefer email?
One email tonight before GPS IIF-1 is visible, never more than 2/week.