Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 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)
 03/17/2023   20:39:16   (  -0.02,-104.77) (  -0.94,-108.90)  470.51                80
 03/18/2023   20:23:11   (  -0.02,-104.77) (   0.08,-104.36)   46.68                80
 03/21/2023   08:26:12   (   0.02,-104.77) (   0.08,-105.10)   36.91                80
 03/22/2023   08:04:46   (   0.02,-104.78) (  -0.94,-100.57)  480.41                80
 03/23/2023   20:26:41   (  -0.02,-104.81) (  -0.27,-105.86)  120.86                80
 03/24/2023   20:10:35   (  -0.02,-104.81) (   0.75,-101.33)  396.88                80
 03/26/2023   08:32:21   (   0.03,-104.81) (   0.41,-106.60)  203.29                80
 03/27/2023   08:10:56   (   0.03,-104.82) (  -0.62,-102.07)  314.07                80
 03/28/2023   20:32:50   (  -0.02,-104.84) (  -0.57,-107.37)  287.86                80
 03/29/2023   20:16:44   (  -0.02,-104.85) (   0.41,-102.83)  229.86                80