Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 11 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)
 11/19/2023   20:09:48   (   0.00,-104.65) (   0.72,-101.40)  370.22                80
 11/21/2023   08:31:38   (   0.00,-104.68) (   0.45,-106.68)  228.00                80
 11/22/2023   08:10:14   (   0.00,-104.68) (  -0.57,-102.15)  288.03                80
 11/23/2023   20:32:11   (  -0.00,-104.65) (  -0.64,-107.46)  319.72                80
 11/24/2023   20:16:08   (  -0.00,-104.65) (   0.39,-102.93)  196.64                80
 11/26/2023   08:37:57   (   0.01,-104.69) (   0.78,-108.21)  400.91                80
 11/27/2023   08:16:33   (   0.02,-104.69) (  -0.19,-103.67)  115.24                80
 11/28/2023   20:38:30   (  -0.02,-104.66) (  -1.01,-108.98)  492.86                80
 11/29/2023   20:22:27   (  -0.03,-104.66) (   0.03,-104.45)   23.43                80
 12/02/2023   08:25:31   (   0.03,-104.69) (   0.16,-105.19)   57.69                80