Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 9 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)
 09/21/2023   18:31:05   (  -0.06, -75.21) (  -0.51, -77.18)  224.15                80
 09/22/2023   18:15:00   (  -0.06, -75.21) (   0.51, -72.65)  292.16                80
 09/24/2023   06:34:07   (   0.05, -75.21) (   0.68, -77.92)  308.80                80
 09/25/2023   06:18:03   (   0.05, -75.21) (  -0.35, -73.39)  207.71                80
 09/26/2023   18:37:19   (  -0.04, -75.22) (  -0.84, -78.69)  396.27                80
 09/27/2023   18:21:15   (  -0.04, -75.23) (   0.19, -74.17)  120.93                80
 09/29/2023   06:40:22   (   0.04, -75.24) (   0.99, -79.44)  478.17                80
 09/30/2023   06:24:18   (   0.04, -75.25) (  -0.05, -74.91)   39.54                80
 10/02/2023   18:24:48   (  -0.04, -75.29) (  -0.14, -75.68)   44.94                80
 10/03/2023   18:08:44   (  -0.04, -75.30) (   0.90, -71.15)  473.17                80