Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 4 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)
 04/22/2023   06:43:39   (  -0.04, -75.20) (   0.88, -79.41)  478.33                80
 04/23/2023   06:22:12   (  -0.04, -75.20) (  -0.09, -74.86)   38.88                80
 04/25/2023   18:27:59   (   0.03, -75.20) (  -0.06, -75.62)   47.32                80
 04/26/2023   18:06:32   (   0.03, -75.21) (   0.97, -71.08)  470.37                80
 04/28/2023   06:30:57   (  -0.02, -75.22) (   0.22, -76.34)  127.11                80
 04/29/2023   06:09:30   (  -0.02, -75.23) (  -0.82, -71.80)  391.04                80
 04/30/2023   18:34:02   (   0.02, -75.24) (  -0.40, -77.09)  210.94                80
 05/01/2023   18:12:36   (   0.02, -75.25) (   0.64, -72.56)  307.69                80
 05/03/2023   06:37:00   (  -0.01, -75.28) (   0.54, -77.81)  288.49                80
 05/04/2023   06:15:33   (  -0.02, -75.29) (  -0.45, -73.27)  230.38                80