Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 1 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)
 01/06/2023   06:29:50   (  -0.03, -75.19) (   0.27, -76.45)  144.16                80
 01/07/2023   06:11:06   (  -0.02, -75.19) (  -0.76, -71.92)  372.41                80
 01/08/2023   18:33:02   (   0.03, -75.20) (  -0.42, -77.23)  231.87                80
 01/09/2023   18:16:56   (   0.03, -75.20) (   0.56, -72.70)  285.20                80
 01/11/2023   06:38:45   (  -0.03, -75.22) (   0.57, -77.98)  314.34                80
 01/12/2023   06:17:19   (  -0.03, -75.23) (  -0.41, -73.44)  203.02                80
 01/13/2023   18:39:15   (   0.03, -75.24) (  -0.76, -78.75)  400.17                80
 01/14/2023   18:23:11   (   0.03, -75.26) (   0.28, -74.23)  117.68                80
 01/16/2023   06:44:58   (  -0.03, -75.28) (   0.90, -79.50)  480.51                80
 01/17/2023   06:23:33   (  -0.02, -75.30) (  -0.08, -74.96)   37.36                80