Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2023   18:23:00   (   0.05, -75.18) (   0.26, -74.22)  109.11                80
 02/01/2023   06:44:46   (  -0.05, -75.19) (   0.93, -79.49)  490.98                80
 02/02/2023   06:23:21   (  -0.04, -75.19) (  -0.08, -74.96)   25.78                80
 02/04/2023   18:26:31   (   0.04, -75.19) (  -0.07, -75.73)   61.28                80
 02/05/2023   18:10:25   (   0.04, -75.20) (   0.95, -71.20)  456.12                80
 02/07/2023   06:32:12   (  -0.03, -75.22) (   0.22, -76.47)  142.38                80
 02/08/2023   06:10:46   (  -0.03, -75.23) (  -0.80, -71.94)  375.37                80
 02/09/2023   18:32:40   (   0.03, -75.24) (  -0.42, -77.24)  227.24                80
 02/10/2023   18:16:35   (   0.03, -75.26) (   0.61, -72.71)  290.91                80
 02/12/2023   06:38:21   (  -0.03, -75.28) (   0.56, -77.97)  306.43                80