Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 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)
 07/11/2023   08:25:13   (   0.01,-104.73) (   0.08,-105.03)   34.12                80
 07/12/2023   08:03:48   (   0.01,-104.73) (  -0.92,-100.50)  482.58                80
 07/13/2023   20:25:43   (  -0.02,-104.72) (  -0.26,-105.80)  122.82                80
 07/14/2023   20:09:37   (  -0.02,-104.73) (   0.75,-101.27)  394.16                80
 07/16/2023   08:31:24   (   0.02,-104.74) (   0.44,-106.53)  203.96                80
 07/17/2023   08:09:58   (   0.02,-104.74) (  -0.57,-101.99)  312.73                80
 07/18/2023   20:31:54   (  -0.02,-104.73) (  -0.60,-107.30)  293.16                80
 07/19/2023   20:15:48   (  -0.02,-104.73) (   0.41,-102.77)  224.00                80
 07/21/2023   08:37:35   (   0.02,-104.76) (   0.72,-108.04)  373.17                80
 07/22/2023   08:16:10   (   0.01,-104.77) (  -0.29,-103.51)  143.86                80