Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2025 9 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2025   20:11:39   (   0.10,-104.69) (   0.82,-101.43)  370.34                80
 09/23/2025   08:33:26   (  -0.10,-104.68) (   0.35,-106.70)  230.12                80
 09/24/2025   08:12:00   (  -0.10,-104.69) (  -0.66,-102.17)  286.88                80
 09/25/2025   20:33:56   (   0.10,-104.70) (  -0.50,-107.47)  315.10                80
 09/26/2025   20:17:50   (   0.10,-104.71) (   0.51,-102.93)  202.12                80
 09/28/2025   08:39:37   (  -0.10,-104.70) (   0.71,-108.19)  398.06                80
 09/29/2025   08:18:12   (  -0.10,-104.70) (  -0.36,-103.67)  118.61                80
 09/30/2025   20:40:06   (   0.10,-104.71) (  -0.85,-108.96)  484.38                80
 10/01/2025   20:24:01   (   0.11,-104.71) (   0.16,-104.42)   32.66                80
 10/04/2025   08:27:03   (  -0.11,-104.72) (  -0.03,-105.16)   50.02                80