Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 15.  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)
 06/16/2023   20:32:13   (  -0.00,-104.71) (  -0.58,-107.34)  299.44                80
 06/17/2023   20:16:07   (  -0.01,-104.71) (   0.40,-102.80)  217.23                80
 06/19/2023   08:37:55   (   0.01,-104.72) (   0.77,-108.07)  382.15                80
 06/20/2023   08:16:30   (   0.02,-104.72) (  -0.27,-103.55)  134.24                80
 06/21/2023   20:38:25   (  -0.02,-104.71) (  -0.96,-108.84)  471.23                80
 06/22/2023   20:22:21   (  -0.02,-104.71) (   0.08,-104.32)   45.63                80
 06/25/2023   08:25:23   (   0.02,-104.73) (   0.09,-105.05)   36.16                80
 06/26/2023   08:03:57   (   0.02,-104.74) (  -0.89,-100.51)  480.53                80
 06/27/2023   20:25:54   (  -0.03,-104.73) (  -0.26,-105.83)  124.72                80
 06/28/2023   20:09:48   (  -0.03,-104.73) (   0.73,-101.29)  392.24                80