Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 7 8.  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)
 07/08/2023   18:39:51   (  -0.01, -75.19) (   1.77, -79.30)  498.13                 0
 07/09/2023   18:19:02   (  -0.01, -75.20) (   0.25, -74.20)  115.06                80
 07/11/2023   06:43:29   (   0.01, -75.22) (   0.95, -79.46)  482.96                80
 07/12/2023   06:22:03   (   0.01, -75.24) (  -0.06, -74.93)   35.60                80
 07/14/2023   18:27:53   (  -0.02, -75.30) (  -0.11, -75.70)   45.95                80
 07/15/2023   18:06:27   (  -0.03, -75.32) (   0.90, -71.17)  473.05                80
 07/17/2023   06:30:54   (   0.03, -75.35) (   0.29, -76.43)  123.81                80
 07/18/2023   06:09:28   (   0.03, -75.37) (  -0.73, -71.90)  395.54                80
 07/19/2023   18:34:04   (  -0.04, -75.41) (  -0.44, -77.20)  203.49                80
 07/20/2023   18:12:38   (  -0.04, -75.44) (   0.58, -72.67)  316.37                80
 07/22/2023   06:37:04   (   0.04, -75.49) (   0.60, -77.93)  279.02                80