Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 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)
 09/19/2023   08:09:39   (  -0.01,-104.71) (  -0.64,-102.00)  309.90                80
 09/20/2023   20:31:35   (   0.01,-104.68) (  -0.56,-107.30)  297.85                80
 09/21/2023   20:15:30   (   0.00,-104.68) (   0.40,-102.76)  218.38                80
 09/23/2023   08:37:18   (  -0.00,-104.70) (   0.73,-108.04)  379.90                80
 09/24/2023   08:15:54   (  -0.01,-104.70) (  -0.30,-103.51)  135.59                80
 09/25/2023   20:37:50   (   0.02,-104.66) (  -0.89,-108.82)  473.23                80
 09/26/2023   20:21:45   (   0.01,-104.66) (   0.08,-104.28)   43.10                80
 09/29/2023   08:24:47   (  -0.00,-104.68) (   0.07,-105.02)   37.89                80
 09/30/2023   08:03:22   (  -0.00,-104.68) (  -0.91,-100.48)  478.41                80
 10/01/2023   20:25:18   (  -0.01,-104.65) (  -0.26,-105.79)  129.56                80
 10/02/2023   20:09:13   (  -0.01,-104.65) (   0.72,-101.25)  387.07                80