Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 9.  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)
 06/10/2023   06:24:58   (  -0.02, -75.18) (  -0.08, -74.95)   26.35                80
 06/12/2023   18:25:30   (   0.02, -75.20) (  -0.07, -75.73)   60.53                80
 06/13/2023   18:09:24   (   0.02, -75.21) (   0.90, -71.19)  456.82                80
 06/15/2023   06:28:32   (  -0.03, -75.22) (   0.28, -76.46)  142.38                80
 06/16/2023   06:12:27   (  -0.03, -75.23) (  -0.76, -71.94)  375.13                80
 06/17/2023   18:31:44   (   0.04, -75.25) (  -0.42, -77.25)  227.86                80
 06/18/2023   18:15:39   (   0.03, -75.26) (   0.62, -72.72)  290.01                80
 06/20/2023   06:34:46   (  -0.04, -75.28) (   0.55, -77.99)  308.17                80
 06/21/2023   06:18:41   (  -0.04, -75.30) (  -0.43, -73.45)  210.11                80
 06/22/2023   18:37:57   (   0.04, -75.33) (  -0.73, -78.76)  391.69                80