Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 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)
 12/21/2023   20:10:02   (  -0.00,-104.67) (   0.70,-101.44)  367.66                80
 12/23/2023   08:31:51   (   0.02,-104.70) (   0.45,-106.71)  229.07                80
 12/24/2023   08:10:26   (   0.02,-104.70) (  -0.57,-102.18)  287.45                80
 12/25/2023   20:32:22   (  -0.02,-104.67) (  -0.66,-107.48)  319.80                80
 12/26/2023   20:16:17   (  -0.02,-104.67) (   0.37,-102.95)  196.85                80
 12/28/2023   08:38:05   (   0.02,-104.71) (   0.78,-108.22)  400.01                80
 12/29/2023   08:16:40   (   0.01,-104.71) (  -0.20,-103.68)  116.53                80
 12/30/2023   20:38:36   (  -0.00,-104.68) (  -0.96,-108.99)  490.67                80
 12/31/2023   20:22:32   (   0.00,-104.69) (   0.07,-104.46)   26.39                80
 01/03/2024   08:25:35   (  -0.01,-104.73) (   0.08,-105.20)   52.50                80