Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 1 14.  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)
 01/14/2023   18:23:11   (   0.04, -75.19) (   0.29, -74.23)  110.83                80
 01/16/2023   06:44:57   (  -0.04, -75.20) (   0.94, -79.49)  489.69                80
 01/17/2023   06:23:33   (  -0.03, -75.20) (  -0.11, -74.97)   27.30                80
 01/19/2023   18:26:43   (   0.02, -75.22) (  -0.11, -75.73)   59.18                80
 01/20/2023   18:10:37   (   0.01, -75.22) (   0.89, -71.20)  458.03                80
 01/22/2023   06:32:24   (  -0.00, -75.23) (   0.27, -76.47)  141.76                80
 01/23/2023   06:10:59   (  -0.00, -75.24) (  -0.73, -71.94)  375.65                80
 01/24/2023   18:32:55   (   0.02, -75.26) (  -0.40, -77.26)  227.16                80
 01/25/2023   18:16:50   (   0.02, -75.27) (   0.61, -72.72)  291.00                80
 01/27/2023   06:38:36   (  -0.02, -75.30) (   0.59, -77.99)  306.90                80