Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 17.  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)
 09/18/2023   08:31:03   (  -0.00,-104.71) (   0.39,-106.52)  206.10                80
 09/19/2023   08:09:39   (  -0.00,-104.71) (  -0.62,-101.99)  309.95                80
 09/20/2023   20:31:35   (   0.01,-104.68) (  -0.58,-107.30)  298.04                80
 09/21/2023   20:15:31   (   0.01,-104.68) (   0.44,-102.77)  217.90                80
 09/23/2023   08:37:18   (  -0.02,-104.70) (   0.75,-108.03)  380.62                80
 09/24/2023   08:15:53   (  -0.02,-104.69) (  -0.27,-103.51)  134.97                80
 09/25/2023   20:37:50   (   0.02,-104.65) (  -0.92,-108.81)  473.75                80
 09/26/2023   20:21:45   (   0.02,-104.65) (   0.11,-104.28)   42.34                80
 09/29/2023   08:24:48   (  -0.01,-104.68) (   0.04,-105.02)   39.07                80
 09/30/2023   08:03:23   (  -0.01,-104.67) (  -0.93,-100.48)  477.14                80