Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 21.  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)
 06/22/2023   18:37:56   (   0.02, -75.19) (  -0.78, -78.75)  405.76                80
 06/23/2023   18:21:52   (   0.02, -75.19) (   0.27, -74.22)  111.17                80
 06/25/2023   06:40:58   (  -0.03, -75.20) (   0.95, -79.48)  488.50                80
 06/26/2023   06:24:54   (  -0.02, -75.21) (  -0.10, -74.96)   28.87                80
 06/28/2023   18:25:24   (   0.03, -75.23) (  -0.06, -75.73)   56.95                80
 06/29/2023   18:09:19   (   0.03, -75.24) (   0.93, -71.20)  460.59                80
 07/01/2023   06:28:26   (  -0.04, -75.25) (   0.22, -76.47)  138.56                80
 07/02/2023   06:12:21   (  -0.04, -75.26) (  -0.78, -71.94)  378.93                80
 07/03/2023   18:31:36   (   0.04, -75.28) (  -0.42, -77.24)  224.06                80
 07/04/2023   18:15:32   (   0.04, -75.29) (   0.64, -72.71)  293.73                80