Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 11 20.  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)
 11/21/2023   08:31:38   (  -0.02,-104.68) (   0.45,-106.68)  228.47                80
 11/22/2023   08:10:14   (  -0.02,-104.68) (  -0.57,-102.15)  287.52                80
 11/23/2023   20:32:12   (   0.02,-104.65) (  -0.58,-107.47)  320.20                80
 11/24/2023   20:16:08   (   0.02,-104.66) (   0.39,-102.93)  196.28                80
 11/26/2023   08:37:57   (   0.02,-104.69) (   0.78,-108.21)  400.40                80
 11/27/2023   08:16:33   (   0.02,-104.69) (  -0.19,-103.67)  115.51                80
 11/28/2023   20:38:30   (  -0.01,-104.66) (  -1.01,-108.98)  492.80                80
 11/29/2023   20:22:27   (  -0.01,-104.66) (   0.03,-104.45)   23.31                80
 12/02/2023   08:25:32   (  -0.00,-104.70) (   0.10,-105.21)   58.06                80
 12/03/2023   08:04:09   (  -0.01,-104.70) (  -0.94,-100.68)  458.06                80