Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 23.  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)
 06/23/2023   18:21:52   (   0.02, -75.19) (   0.25, -74.22)  111.18                80
 06/25/2023   06:40:59   (  -0.03, -75.20) (   0.90, -79.49)  488.46                80
 06/26/2023   06:24:53   (  -0.02, -75.21) (  -0.09, -74.96)   28.85                80
 06/28/2023   18:25:24   (   0.03, -75.23) (  -0.07, -75.73)   56.85                80
 06/29/2023   18:09:19   (   0.03, -75.24) (   0.92, -71.20)  460.66                80
 07/01/2023   06:28:26   (  -0.04, -75.25) (   0.23, -76.47)  138.47                80
 07/02/2023   06:12:21   (  -0.04, -75.26) (  -0.77, -71.93)  379.03                80
 07/03/2023   18:31:36   (   0.04, -75.28) (  -0.42, -77.23)  223.97                80
 07/04/2023   18:15:31   (   0.04, -75.29) (   0.64, -72.71)  293.83                80
 07/06/2023   06:34:38   (  -0.05, -75.30) (   0.57, -77.97)  304.61                80