Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 6 18.  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)
 06/20/2025   08:11:47   (  -0.01,-100.95) (   0.21,-101.99)  118.13                80
 06/21/2025   07:55:41   (  -0.01,-100.41) (  -0.66, -97.43)  339.77                80
 06/22/2025   20:14:56   (   0.01, -99.61) (  -0.66,-102.71)  352.84                80
 06/23/2025   19:58:50   (   0.01, -99.07) (   0.21, -98.15)  104.82                80
 06/26/2025   07:59:08   (  -0.01, -97.69) (   0.25, -98.82)  129.45                80
 06/27/2025   07:43:03   (  -0.01, -97.15) (  -0.69, -94.28)  328.48                80
 06/28/2025   20:02:17   (   0.01, -96.35) (  -0.69, -99.54)  363.49                80
 06/29/2025   19:46:11   (   0.01, -95.82) (   0.19, -94.98)   95.02                80
 07/02/2025   07:46:30   (  -0.00, -94.46) (   0.27, -95.66)  136.70                80