Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 10 19.  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)
 10/20/2023   08:30:52   (   0.00,-104.70) (   0.41,-106.49)  205.02                80
 10/21/2023   08:09:30   (   0.00,-104.69) (  -0.62,-101.97)  309.83                80
 10/22/2023   20:31:28   (  -0.00,-104.65) (  -0.61,-107.28)  299.79                80
 10/23/2023   20:15:26   (  -0.01,-104.65) (   0.43,-102.76)  215.47                80
 10/25/2023   08:37:16   (   0.01,-104.68) (   0.73,-108.05)  383.50                80
 10/26/2023   08:15:53   (   0.01,-104.67) (  -0.26,-103.52)  131.75                80
 10/27/2023   20:37:51   (  -0.00,-104.64) (  -0.96,-108.82)  477.63                80
 10/28/2023   20:21:48   (  -0.00,-104.64) (   0.09,-104.31)   37.95                80
 10/31/2023   08:24:54   (  -0.00,-104.66) (   0.11,-105.05)   45.44                80
 11/01/2023   08:03:32   (  -0.00,-104.66) (  -0.95,-100.54)  469.88                80