Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 4 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)
 04/18/2025   20:33:09   (   0.02,-104.39) (  -0.64,-107.25)  325.58                80
 04/19/2025   20:17:03   (   0.02,-104.39) (   0.37,-102.71)  191.41                80
 04/21/2025   08:38:48   (  -0.01,-104.35) (   0.80,-107.97)  412.07                80
 04/22/2025   08:17:22   (  -0.01,-104.35) (  -0.21,-103.43)  104.64                80
 04/23/2025   20:39:15   (   0.01,-104.38) (  -0.96,-108.72)  495.42                80
 04/24/2025   20:23:09   (   0.01,-104.38) (   0.06,-104.19)   21.78                80
 04/27/2025   08:26:06   (  -0.01,-104.34) (   0.14,-104.90)   64.45                80
 04/28/2025   08:04:40   (  -0.01,-104.33) (  -0.88,-100.36)  452.19                80
 04/29/2025   20:26:33   (   0.01,-104.35) (  -0.26,-105.66)  148.45                80
 04/30/2025   20:10:26   (   0.01,-104.35) (   0.71,-101.11)  368.44                80
 05/02/2025   08:32:11   (  -0.00,-104.32) (   0.45,-106.37)  234.53                80