Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 4.  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)
 08/04/2023   20:15:32   (  -0.01,-104.70) (   0.45,-102.72)  226.15                80
 08/06/2023   08:37:17   (   0.01,-104.72) (   0.76,-107.98)  371.60                80
 08/07/2023   08:15:52   (   0.01,-104.72) (  -0.27,-103.45)  144.96                80
 08/08/2023   20:37:46   (  -0.01,-104.69) (  -0.91,-108.74)  461.55                80
 08/09/2023   20:21:39   (  -0.01,-104.69) (   0.07,-104.20)   55.36                80
 08/12/2023   08:24:39   (   0.02,-104.71) (   0.09,-104.93)   25.42                80
 08/13/2023   08:03:14   (   0.02,-104.71) (  -0.95,-100.40)  491.23                80
 08/14/2023   20:25:07   (  -0.03,-104.68) (  -0.27,-105.69)  115.30                80
 08/15/2023   20:09:02   (  -0.03,-104.68) (   0.78,-101.16)  401.79                80
 08/17/2023   08:30:47   (   0.03,-104.71) (   0.42,-106.42)  194.67                80