Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 21.  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)
 05/21/2023   20:22:24   (  -0.00,-104.72) (   0.12,-104.29)   49.63                80
 05/24/2023   08:25:27   (  -0.01,-104.72) (   0.09,-105.02)   35.62                80
 05/25/2023   08:04:02   (  -0.01,-104.72) (  -0.93,-100.50)  480.30                80
 05/26/2023   20:25:59   (   0.01,-104.71) (  -0.23,-105.81)  125.21                80
 05/27/2023   20:09:55   (   0.02,-104.71) (   0.79,-101.28)  391.15                80
 05/29/2023   08:31:42   (  -0.02,-104.72) (   0.41,-106.55)  208.83                80
 05/30/2023   08:10:18   (  -0.02,-104.72) (  -0.61,-102.02)  307.36                80
 05/31/2023   20:32:15   (   0.02,-104.71) (  -0.53,-107.34)  298.43                80
 06/01/2023   20:16:10   (   0.02,-104.71) (   0.43,-102.80)  217.89                80
 06/03/2023   08:37:58   (  -0.03,-104.72) (   0.71,-108.08)  382.09                80
 06/04/2023   08:16:33   (  -0.03,-104.72) (  -0.32,-103.55)  133.62                80