Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 7 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)
 07/22/2023   06:37:05   (   0.02, -75.20) (   0.60, -77.93)  310.42                80
 07/23/2023   06:15:39   (   0.02, -75.21) (  -0.41, -73.40)  206.87                80
 07/24/2023   18:37:34   (  -0.02, -75.22) (  -0.80, -78.69)  395.70                80
 07/25/2023   18:21:28   (  -0.02, -75.23) (   0.22, -74.16)  121.87                80
 07/27/2023   06:43:14   (   0.02, -75.24) (   0.96, -79.42)  477.23                80
 07/28/2023   06:21:49   (   0.03, -75.24) (  -0.06, -74.89)   40.38                80
 07/30/2023   18:24:58   (  -0.04, -75.26) (  -0.12, -75.66)   44.26                80
 07/31/2023   18:06:12   (  -0.04, -75.27) (   0.91, -71.12)  473.54                80
 08/02/2023   06:30:38   (   0.04, -75.29) (   0.32, -76.38)  125.08                80
 08/03/2023   06:09:12   (   0.04, -75.30) (  -0.71, -71.85)  393.14                80