Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 11 10.  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)
 11/10/2023   08:37:41   (   0.00,-104.68) (   0.79,-108.14)  394.66                80
 11/11/2023   08:16:17   (  -0.00,-104.68) (  -0.22,-103.61)  121.18                80
 11/12/2023   20:38:15   (   0.00,-104.66) (  -0.96,-108.93)  486.68                80
 11/13/2023   20:22:12   (  -0.00,-104.66) (   0.06,-104.40)   29.25                80
 11/16/2023   08:25:18   (   0.01,-104.67) (   0.10,-105.15)   54.03                80
 11/17/2023   08:03:54   (   0.01,-104.67) (  -0.92,-100.63)  461.36                80
 11/18/2023   20:25:52   (  -0.01,-104.63) (  -0.29,-105.93)  147.33                80
 11/19/2023   20:09:48   (  -0.01,-104.63) (   0.74,-101.41)  368.33                80
 11/21/2023   08:31:38   (   0.01,-104.66) (   0.43,-106.68)  230.38                80
 11/22/2023   08:10:13   (   0.01,-104.65) (  -0.55,-102.15)  285.34                80
 11/23/2023   20:32:10   (  -0.01,-104.62) (  -0.65,-107.45)  323.01                80