Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 7 7.  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   18:37:48   (   0.01, -75.20) (  -0.75, -78.74)  402.47                80
 07/09/2023   18:21:42   (   0.01, -75.21) (   0.25, -74.20)  115.00                80
 07/11/2023   06:43:29   (  -0.01, -75.22) (   0.94, -79.47)  483.87                80
 07/12/2023   06:22:03   (  -0.00, -75.23) (  -0.06, -74.93)   33.82                80
 07/14/2023   18:25:13   (  -0.01, -75.26) (  -0.10, -75.70)   50.33                80
 07/15/2023   18:09:08   (  -0.01, -75.27) (   0.91, -71.17)  467.84                80
 07/17/2023   06:30:54   (   0.02, -75.29) (   0.28, -76.43)  129.92                80
 07/18/2023   06:09:28   (   0.02, -75.31) (  -0.73, -71.90)  388.56                80
 07/19/2023   18:31:24   (  -0.02, -75.34) (  -0.43, -77.20)  212.30                80
 07/20/2023   18:15:18   (  -0.02, -75.36) (   0.59, -72.67)  306.74                80