Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 19.  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)
 06/20/2023   08:16:30   (  -0.01,-104.72) (  -0.27,-103.55)  133.30                80
 06/21/2023   20:38:26   (  -0.00,-104.71) (  -0.90,-108.86)  472.00                80
 06/22/2023   20:22:21   (  -0.01,-104.71) (   0.09,-104.32)   44.92                80
 06/25/2023   08:25:23   (   0.02,-104.73) (   0.09,-105.05)   37.09                80
 06/26/2023   08:03:57   (   0.02,-104.73) (  -0.90,-100.51)  479.57                80
 06/27/2023   20:25:54   (  -0.02,-104.72) (  -0.26,-105.83)  125.89                80
 06/28/2023   20:09:48   (  -0.02,-104.72) (   0.74,-101.29)  390.88                80
 06/30/2023   08:31:35   (   0.01,-104.73) (   0.42,-106.56)  208.23                80
 07/01/2023   08:10:10   (   0.01,-104.73) (  -0.57,-102.02)  307.84                80
 07/02/2023   20:32:06   (   0.00,-104.71) (  -0.57,-107.34)  299.09                80