Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2023   20:32:11   (  -0.01,-104.72) (  -0.58,-107.29)  292.59                80
 05/16/2023   20:16:07   (  -0.01,-104.73) (   0.42,-102.76)  223.97                80
 05/18/2023   08:37:55   (   0.01,-104.73) (   0.75,-108.03)  376.61                80
 05/19/2023   08:16:31   (   0.01,-104.73) (  -0.26,-103.50)  139.58                80
 05/20/2023   20:38:28   (  -0.01,-104.73) (  -0.90,-108.82)  465.46                80
 05/21/2023   20:22:24   (  -0.01,-104.73) (   0.11,-104.29)   50.96                80
 05/24/2023   08:25:27   (   0.00,-104.74) (   0.04,-105.04)   33.23                80
 05/25/2023   08:04:03   (  -0.00,-104.74) (  -0.97,-100.51)  483.03                80
 05/26/2023   20:25:59   (   0.01,-104.74) (  -0.24,-105.81)  121.90                80
 05/27/2023   20:09:55   (   0.01,-104.75) (   0.78,-101.28)  394.83                80
 05/29/2023   08:31:43   (  -0.01,-104.76) (   0.38,-106.56)  204.48                80