Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 18.  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)
 06/20/2023   06:34:46   (  -0.02, -75.19) (   0.59, -77.98)  317.86                80
 06/21/2023   06:18:40   (  -0.02, -75.19) (  -0.40, -73.44)  198.53                80
 06/22/2023   18:37:56   (   0.03, -75.19) (  -0.77, -78.75)  405.85                80
 06/23/2023   18:21:51   (   0.03, -75.19) (   0.21, -74.21)  111.12                80
 06/25/2023   06:40:58   (  -0.03, -75.20) (   0.95, -79.49)  488.48                80
 06/26/2023   06:24:54   (  -0.03, -75.21) (  -0.10, -74.96)   28.88                80
 06/28/2023   18:25:25   (   0.03, -75.23) (  -0.07, -75.74)   56.85                80
 06/29/2023   18:09:19   (   0.03, -75.24) (   0.92, -71.20)  460.68                80
 07/01/2023   06:28:26   (  -0.04, -75.26) (   0.24, -76.47)  138.42                80
 07/02/2023   06:12:21   (  -0.04, -75.27) (  -0.76, -71.93)  379.09                80