Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 7 3.  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)
 07/03/2023   18:31:36   (   0.02, -75.19) (  -0.43, -77.23)  232.42                80
 07/04/2023   18:15:31   (   0.03, -75.19) (   0.57, -72.70)  283.91                80
 07/06/2023   06:37:18   (  -0.03, -75.19) (   0.57, -77.97)  316.16                80
 07/07/2023   06:15:52   (  -0.03, -75.20) (  -0.43, -73.44)  200.70                80
 07/08/2023   18:37:48   (   0.03, -75.20) (  -0.76, -78.74)  403.15                80
 07/09/2023   18:21:42   (   0.03, -75.21) (   0.24, -74.20)  114.34                80
 07/11/2023   06:43:29   (  -0.04, -75.23) (   0.90, -79.48)  484.05                80
 07/12/2023   06:22:04   (  -0.04, -75.24) (  -0.10, -74.94)   33.60                80
 07/14/2023   18:25:14   (   0.05, -75.26) (  -0.07, -75.71)   51.50                80
 07/15/2023   18:09:08   (   0.05, -75.28) (   0.94, -71.18)  466.62                80
 07/17/2023   06:30:56   (  -0.06, -75.30) (   0.20, -76.45)  130.82                80