Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 7 4.  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)
 07/04/2023   18:15:30   (  -0.01, -75.19) (   0.54, -72.69)  284.69                80
 07/06/2023   06:37:17   (   0.01, -75.19) (   0.61, -77.96)  315.50                80
 07/07/2023   06:15:52   (   0.00, -75.19) (  -0.40, -73.43)  201.22                80
 07/08/2023   18:37:47   (  -0.00, -75.20) (  -0.80, -78.73)  402.64                80
 07/09/2023   18:21:42   (  -0.00, -75.20) (   0.21, -74.19)  114.77                80
 07/11/2023   06:43:29   (   0.00, -75.22) (   0.93, -79.47)  483.65                80
 07/12/2023   06:22:03   (   0.01, -75.23) (  -0.07, -74.93)   34.02                80
 07/14/2023   18:25:13   (  -0.01, -75.25) (  -0.10, -75.70)   50.87                80
 07/15/2023   18:09:08   (  -0.01, -75.27) (   0.91, -71.17)  467.23                80
 07/17/2023   06:30:54   (   0.02, -75.29) (   0.29, -76.43)  130.18                80
 07/18/2023   06:09:29   (   0.02, -75.31) (  -0.72, -71.90)  388.21                80