Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 06/17/2025   20:11:28   (  -0.01,-102.32) (   0.23,-101.31)  116.04                80
 06/20/2025   08:11:47   (   0.02,-100.95) (   0.25,-101.98)  117.44                80
 06/21/2025   07:55:41   (  -0.01,-100.41) (  -0.68, -97.43)  339.34                80
 06/22/2025   20:14:55   (   0.02, -99.60) (  -0.70,-102.70)  354.18                80
 06/23/2025   19:58:50   (   0.02, -99.05) (   0.24, -98.15)  103.28                80
 06/26/2025   07:59:09   (  -0.02, -97.68) (   0.22, -98.83)  130.98                80
 06/27/2025   07:43:02   (  -0.01, -97.14) (  -0.66, -94.27)  326.87                80
 06/28/2025   20:02:17   (   0.01, -96.33) (  -0.72, -99.54)  365.74                80
 06/29/2025   19:46:10   (  -0.00, -95.79) (   0.16, -94.98)   92.68                80