Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 7.  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)
 06/09/2023   08:25:27   (  -0.00,-104.71) (   0.07,-105.05)   38.62                80
 06/10/2023   08:04:03   (  -0.01,-104.71) (  -0.96,-100.53)  477.58                80
 06/11/2023   20:25:59   (   0.01,-104.71) (  -0.22,-105.83)  127.37                80
 06/12/2023   20:09:54   (   0.01,-104.72) (   0.75,-101.29)  389.53                80
 06/14/2023   08:31:41   (  -0.01,-104.73) (   0.43,-106.56)  209.47                80
 06/15/2023   08:10:17   (  -0.01,-104.73) (  -0.61,-102.04)  307.00                80
 06/16/2023   20:32:13   (   0.01,-104.72) (  -0.57,-107.35)  298.57                80
 06/17/2023   20:16:07   (   0.01,-104.73) (   0.41,-102.81)  218.19                80
 06/19/2023   08:37:55   (  -0.01,-104.74) (   0.76,-108.08)  380.43                80
 06/20/2023   08:16:30   (  -0.01,-104.74) (  -0.28,-103.55)  135.97                80