Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 1.  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)
 07/01/2023   08:10:10   (   0.00,-104.73) (  -0.58,-102.02)  308.42                80
 07/02/2023   20:32:06   (  -0.00,-104.71) (  -0.57,-107.33)  298.15                80
 07/03/2023   20:16:00   (  -0.00,-104.71) (   0.43,-102.80)  218.15                80
 07/05/2023   08:37:47   (   0.00,-104.72) (   0.78,-108.06)  380.81                80
 07/06/2023   08:16:22   (  -0.00,-104.72) (  -0.28,-103.54)  135.19                80
 07/07/2023   20:38:18   (   0.00,-104.70) (  -0.91,-108.84)  471.77                80
 07/08/2023   20:22:12   (   0.00,-104.70) (   0.09,-104.30)   44.90                80
 07/11/2023   08:25:14   (  -0.00,-104.72) (   0.05,-105.04)   36.25                80
 07/12/2023   08:03:48   (  -0.00,-104.72) (  -0.96,-100.51)  480.25                80
 07/13/2023   20:25:43   (  -0.00,-104.69) (  -0.28,-105.80)  126.56                80
 07/14/2023   20:09:38   (  -0.00,-104.70) (   0.79,-101.28)  390.22                80