Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 6.  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)
 12/07/2023   08:31:48   (  -0.01,-104.68) (   0.46,-106.71)  232.05                80
 12/08/2023   08:10:23   (  -0.01,-104.68) (  -0.54,-102.18)  284.38                80
 12/09/2023   20:32:20   (   0.01,-104.66) (  -0.61,-107.49)  322.62                80
 12/10/2023   20:16:16   (   0.01,-104.66) (   0.40,-102.96)  193.86                80
 12/12/2023   08:38:04   (  -0.01,-104.68) (   0.78,-108.23)  404.00                80
 12/13/2023   08:16:40   (  -0.01,-104.68) (  -0.23,-103.70)  111.96                80
 12/14/2023   20:38:36   (   0.00,-104.64) (  -0.96,-109.00)  496.06                80
 12/15/2023   20:22:32   (   0.00,-104.64) (   0.06,-104.47)   20.18                80
 12/18/2023   08:25:34   (   0.01,-104.67) (   0.15,-105.20)   61.38                80
 12/19/2023   08:04:10   (   0.01,-104.66) (  -0.87,-100.67)  454.92                80