Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 11 13.  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)
 11/13/2023   20:22:12   (   0.00,-104.66) (   0.07,-104.40)   29.57                80
 11/16/2023   08:25:18   (   0.00,-104.68) (   0.09,-105.15)   53.61                80
 11/17/2023   08:03:54   (   0.01,-104.67) (  -0.87,-100.61)  461.94                80
 11/18/2023   20:25:52   (  -0.01,-104.64) (  -0.29,-105.93)  146.47                80
 11/19/2023   20:09:48   (  -0.01,-104.64) (   0.74,-101.40)  369.32                80
 11/21/2023   08:31:38   (   0.01,-104.66) (   0.44,-106.68)  229.25                80
 11/22/2023   08:10:13   (   0.02,-104.66) (  -0.53,-102.14)  286.57                80
 11/23/2023   20:32:11   (  -0.02,-104.63) (  -0.67,-107.45)  321.62                80
 11/24/2023   20:16:07   (  -0.02,-104.63) (   0.37,-102.93)  194.54                80
 11/26/2023   08:37:56   (   0.03,-104.66) (   0.80,-108.20)  403.31                80