Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 1.  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)
 12/02/2023   08:25:30   (   0.02,-104.67) (   0.15,-105.19)   59.45                80
 12/03/2023   08:04:07   (  -0.00,-104.67) (  -0.90,-100.67)  455.95                80
 12/04/2023   20:26:04   (   0.02,-104.64) (  -0.26,-105.98)  151.66                80
 12/05/2023   20:09:59   (   0.02,-104.64) (   0.74,-101.44)  364.67                80
 12/07/2023   08:31:48   (  -0.02,-104.67) (   0.44,-106.71)  233.17                80
 12/08/2023   08:10:23   (  -0.02,-104.67) (  -0.56,-102.18)  282.98                80
 12/09/2023   20:32:20   (   0.02,-104.64) (  -0.63,-107.48)  324.46                80
 12/10/2023   20:16:15   (   0.00,-104.64) (   0.38,-102.95)  192.14                80
 12/12/2023   08:38:03   (   0.01,-104.66) (   0.79,-108.23)  405.32                80
 12/13/2023   08:16:39   (   0.01,-104.66) (  -0.23,-103.70)  110.39                80
 12/14/2023   20:38:34   (  -0.01,-104.62) (  -1.00,-108.99)  498.41                80
 12/15/2023   20:22:30   (   0.00,-104.61) (   0.03,-104.46)   17.36                80