Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2025 6 15.  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)
 06/16/2025   20:27:40   (  -0.01,-104.72) (  -0.31,-105.94)  140.02                80
 06/17/2025   20:11:37   (  -0.01,-104.71) (   0.74,-101.42)  375.43                80
 06/19/2025   08:33:25   (   0.01,-104.70) (   0.43,-106.69)  226.94                80
 06/20/2025   08:12:00   (   0.00,-104.69) (  -0.56,-102.16)  288.23                80
 06/21/2025   20:33:58   (  -0.00,-104.68) (  -0.65,-107.47)  317.87                80
 06/22/2025   20:17:54   (   0.00,-104.67) (   0.41,-102.95)  197.18                80
 06/24/2025   08:39:41   (  -0.01,-104.65) (   0.82,-108.21)  405.64                80
 06/25/2025   08:18:18   (  -0.01,-104.64) (  -0.24,-103.69)  109.29                80
 06/26/2025   20:40:15   (   0.00,-104.63) (  -0.96,-108.99)  497.14                80
 06/27/2025   20:24:11   (   0.00,-104.62) (   0.04,-104.46)   18.26                80