Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 20.  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   06:34:45   (  -0.02, -75.19) (   0.63, -77.97)  317.85                80
 06/21/2023   06:18:40   (  -0.02, -75.19) (  -0.41, -73.45)  198.51                80
 06/22/2023   18:37:57   (   0.03, -75.19) (  -0.75, -78.76)  405.86                80
 06/23/2023   18:21:51   (   0.02, -75.19) (   0.23, -74.22)  111.05                80
 06/25/2023   06:40:59   (  -0.03, -75.20) (   0.93, -79.49)  488.57                80
 06/26/2023   06:24:53   (  -0.03, -75.21) (  -0.06, -74.95)   28.83                80
 06/28/2023   18:25:24   (   0.03, -75.23) (  -0.10, -75.73)   57.03                80
 06/29/2023   18:09:19   (   0.03, -75.24) (   0.95, -71.20)  460.53                80
 07/01/2023   06:28:27   (  -0.04, -75.25) (   0.21, -76.48)  138.66                80
 07/02/2023   06:12:21   (  -0.04, -75.26) (  -0.79, -71.94)  378.84                80
 07/03/2023   18:31:37   (   0.05, -75.28) (  -0.41, -77.24)  224.15                80