Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 3 18.  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)
 03/18/2023   18:38:47   (   0.06, -75.21) (  -0.74, -78.81)  410.01                80
 03/19/2023   18:20:02   (   0.06, -75.22) (   0.28, -74.27)  107.41                80
 03/21/2023   06:44:28   (  -0.06, -75.23) (   0.90, -79.54)  491.72                80
 03/22/2023   06:23:03   (  -0.06, -75.24) (  -0.12, -75.01)   26.11                80
 03/24/2023   18:28:51   (   0.06, -75.28) (  -0.07, -75.77)   57.01                80
 03/25/2023   18:07:26   (   0.06, -75.29) (   0.96, -71.24)  461.41                80
 03/27/2023   06:31:52   (  -0.05, -75.31) (   0.20, -76.51)  136.38                80
 03/28/2023   06:10:27   (  -0.05, -75.33) (  -0.83, -71.98)  382.22                80
 03/29/2023   18:35:01   (   0.04, -75.36) (  -0.36, -77.28)  218.01                80
 03/30/2023   18:13:35   (   0.04, -75.38) (   0.62, -72.74)  301.14                80