Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 9 30.  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)
 09/30/2023   06:21:36   (   0.05, -75.21) (   0.01, -74.89)   35.03                80
 10/02/2023   18:24:48   (  -0.05, -75.23) (  -0.14, -75.67)   50.81                80
 10/03/2023   18:08:43   (  -0.05, -75.23) (   0.84, -71.14)  466.51                80
 10/05/2023   06:30:30   (   0.04, -75.24) (   0.31, -76.41)  133.39                80
 10/06/2023   06:09:06   (   0.04, -75.25) (  -0.74, -71.88)  384.08                80
 10/07/2023   18:31:01   (  -0.03, -75.27) (  -0.48, -77.18)  218.01                80
 10/08/2023   18:14:56   (  -0.03, -75.29) (   0.57, -72.66)  300.05                80
 10/10/2023   06:36:43   (   0.02, -75.31) (   0.63, -77.92)  298.29                80
 10/11/2023   06:15:18   (   0.02, -75.32) (  -0.42, -73.39)  220.23                80
 10/12/2023   18:37:13   (  -0.02, -75.36) (  -0.78, -78.69)  380.35                80
 10/13/2023   18:21:08   (  -0.02, -75.38) (   0.22, -74.16)  138.79                80