Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 4 19.  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)
 04/20/2023   18:19:14   (   0.04, -75.20) (   0.28, -74.14)  120.57                80
 04/22/2023   06:43:39   (  -0.04, -75.20) (   0.92, -79.40)  478.31                80
 04/23/2023   06:22:12   (  -0.04, -75.20) (  -0.11, -74.86)   38.84                80
 04/25/2023   18:27:59   (   0.03, -75.20) (  -0.03, -75.62)   47.09                80
 04/26/2023   18:06:32   (   0.03, -75.21) (   0.94, -71.08)  470.76                80
 04/28/2023   06:30:56   (  -0.02, -75.22) (   0.24, -76.33)  126.74                80
 04/29/2023   06:09:29   (  -0.02, -75.23) (  -0.80, -71.80)  391.48                80
 04/30/2023   18:34:02   (   0.02, -75.24) (  -0.41, -77.09)  210.29                80
 05/01/2023   18:12:35   (   0.02, -75.26) (   0.63, -72.55)  308.43                80
 05/03/2023   06:36:59   (  -0.01, -75.28) (   0.54, -77.81)  287.71                80