Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 4 15.  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)
 04/15/2023   18:13:09   (   0.04, -75.22) (   0.60, -72.66)  291.56                80
 04/17/2023   06:37:34   (  -0.03, -75.23) (   0.56, -77.92)  306.74                80
 04/18/2023   06:16:07   (  -0.03, -75.24) (  -0.45, -73.38)  211.52                80
 04/19/2023   18:40:41   (   0.03, -75.27) (  -0.75, -78.68)  389.22                80
 04/20/2023   18:19:14   (   0.03, -75.28) (   0.27, -74.14)  129.52                80
 04/22/2023   06:43:40   (  -0.03, -75.30) (   0.88, -79.41)  467.52                80
 04/23/2023   06:22:13   (  -0.03, -75.32) (  -0.15, -74.87)   51.38                80
 04/25/2023   18:25:20   (   0.03, -75.37) (  -0.01, -75.63)   29.44                80
 04/26/2023   18:06:32   (   0.02, -75.39) (   0.96, -71.08)  490.25                80
 04/28/2023   06:30:58   (  -0.02, -75.42) (   0.17, -76.35)  105.41                80