Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 3 12.  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)
 03/12/2023   20:33:05   (  -0.02,-104.75) (  -0.64,-107.38)  300.86                80
 03/13/2023   20:17:00   (  -0.02,-104.75) (   0.43,-102.86)  216.21                80
 03/15/2023   08:38:47   (   0.03,-104.74) (   0.77,-108.13)  385.04                80
 03/16/2023   08:17:21   (   0.03,-104.74) (  -0.24,-103.59)  131.59                80
 03/17/2023   20:39:15   (  -0.04,-104.76) (  -0.99,-108.88)  471.16                80
 03/18/2023   20:23:10   (  -0.04,-104.76) (   0.03,-104.35)   45.93                80
 03/21/2023   08:26:11   (   0.04,-104.76) (   0.12,-105.09)   37.51                80
 03/22/2023   08:04:45   (   0.04,-104.77) (  -0.90,-100.56)  479.62                80
 03/23/2023   20:26:40   (  -0.04,-104.78) (  -0.29,-105.86)  122.41                80
 03/24/2023   20:10:34   (  -0.04,-104.79) (   0.74,-101.33)  395.10                80