Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 5 15.  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)
 05/16/2023   18:34:22   (   0.02, -75.19) (  -0.44, -77.19)  228.31                80
 05/17/2023   18:14:56   (   0.03, -75.19) (   0.57, -72.66)  288.04                38
 05/19/2023   06:37:26   (  -0.02, -75.20) (   0.60, -77.94)  312.20                80
 05/20/2023   06:16:02   (  -0.03, -75.21) (  -0.41, -73.41)  204.32                80
 05/21/2023   18:40:39   (   0.02, -75.21) (  -0.75, -78.72)  400.00                80
 05/22/2023   18:19:15   (   0.02, -75.22) (   0.26, -74.19)  116.91                80
 05/24/2023   06:43:43   (  -0.02, -75.23) (   0.90, -79.47)  482.18                80
 05/25/2023   06:22:18   (  -0.02, -75.24) (  -0.11, -74.94)   35.24                80
 05/27/2023   18:28:10   (   0.01, -75.27) (  -0.08, -75.71)   50.05                80
 05/28/2023   18:06:46   (   0.01, -75.29) (   0.94, -71.19)  468.00                80