Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 10 9.  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)
 10/09/2023   08:37:13   (  -0.02,-104.71) (   0.70,-108.03)  377.85                80
 10/10/2023   08:15:48   (  -0.02,-104.71) (  -0.30,-103.49)  138.56                80
 10/11/2023   20:37:43   (   0.02,-104.69) (  -0.89,-108.79)  467.65                80
 10/12/2023   20:21:38   (   0.02,-104.69) (   0.11,-104.26)   49.32                80
 10/15/2023   08:24:38   (   0.01,-104.72) (   0.05,-104.99)   30.61                80
 10/16/2023   08:03:12   (   0.02,-104.71) (  -0.91,-100.44)  486.29                80
 10/17/2023   20:25:07   (  -0.02,-104.69) (  -0.27,-105.74)  120.30                80
 10/18/2023   20:09:02   (  -0.02,-104.69) (   0.76,-101.21)  396.22                80
 10/20/2023   08:30:48   (   0.02,-104.71) (   0.41,-106.48)  201.76                80
 10/21/2023   08:09:23   (   0.02,-104.70) (  -0.62,-101.95)  314.28                80
 10/22/2023   20:31:17   (  -0.02,-104.67) (  -0.59,-107.24)  293.10                80