Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 4 25.  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)
 04/25/2023   18:27:58   (   0.03, -75.18) (  -0.07, -75.61)   49.65                80
 04/26/2023   18:06:32   (   0.04, -75.18) (   0.96, -71.08)  467.29                80
 04/28/2023   06:30:56   (  -0.03, -75.18) (   0.23, -76.34)  131.30                80
 04/29/2023   06:09:30   (  -0.03, -75.18) (  -0.81, -71.80)  386.09                80
 04/30/2023   18:34:02   (   0.02, -75.18) (  -0.41, -77.09)  217.01                80
 05/01/2023   18:12:36   (   0.02, -75.19) (   0.63, -72.55)  300.86                80
 05/03/2023   06:37:00   (  -0.02, -75.21) (   0.55, -77.81)  296.44                80
 05/04/2023   06:15:33   (  -0.02, -75.21) (  -0.44, -73.27)  221.67                80
 05/05/2023   18:40:06   (   0.02, -75.22) (  -0.71, -78.57)  380.68                80
 05/06/2023   18:18:38   (   0.02, -75.23) (   0.28, -74.02)  137.52                80
 05/08/2023   06:43:03   (  -0.02, -75.25) (   0.88, -79.28)  459.49                80
 05/09/2023   06:21:35   (  -0.02, -75.26) (  -0.11, -74.74)   58.76                80