Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 10 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)
 10/21/2023   06:27:45   (   0.04, -75.21) (   0.30, -76.40)  134.95                80
 10/22/2023   06:11:42   (   0.04, -75.21) (  -0.73, -71.88)  380.74                80
 10/23/2023   18:31:02   (  -0.03, -75.22) (  -0.46, -77.19)  224.27                80
 10/24/2023   18:14:59   (  -0.03, -75.23) (   0.57, -72.67)  292.07                80
 10/26/2023   06:34:09   (   0.02, -75.24) (   0.61, -77.95)  308.71                80
 10/27/2023   06:15:26   (   0.03, -75.25) (  -0.36, -73.42)  208.11                80
 10/28/2023   18:37:25   (  -0.02, -75.27) (  -0.82, -78.74)  395.46                80
 10/29/2023   18:21:23   (  -0.03, -75.29) (   0.22, -74.22)  121.71                80
 10/31/2023   06:43:13   (   0.02, -75.31) (   0.97, -79.50)  477.96                80
 11/01/2023   06:21:51   (   0.02, -75.32) (  -0.07, -74.98)   39.32                80