Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 2.  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)
 07/02/2023   20:32:05   (  -0.01,-104.71) (  -0.60,-107.33)  297.92                80
 07/03/2023   20:16:00   (  -0.01,-104.71) (   0.40,-102.79)  218.37                80
 07/05/2023   08:37:47   (   0.00,-104.73) (   0.75,-108.07)  380.60                80
 07/06/2023   08:16:22   (  -0.00,-104.72) (  -0.25,-103.53)  135.38                80
 07/07/2023   20:38:17   (   0.01,-104.70) (  -0.94,-108.83)  471.59                80
 07/08/2023   20:22:12   (   0.01,-104.70) (   0.12,-104.31)   45.18                80
 07/11/2023   08:25:13   (  -0.01,-104.72) (   0.08,-105.04)   36.00                80
 07/12/2023   08:03:48   (  -0.01,-104.72) (  -0.92,-100.50)  480.47                80
 07/13/2023   20:25:43   (   0.01,-104.70) (  -0.26,-105.80)  126.37                80
 07/14/2023   20:09:38   (   0.01,-104.70) (   0.75,-101.27)  390.35                80