Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 8.  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)
 09/08/2023   08:15:51   (  -0.01,-104.71) (  -0.27,-103.48)  139.59                80
 09/09/2023   20:37:48   (   0.01,-104.69) (  -0.90,-108.79)  467.48                80
 09/10/2023   20:21:44   (   0.01,-104.69) (   0.11,-104.26)   48.80                80
 09/13/2023   08:24:48   (  -0.00,-104.71) (   0.05,-105.01)   33.60                80
 09/14/2023   08:03:23   (   0.00,-104.71) (  -0.95,-100.48)  482.67                80
 09/15/2023   20:25:20   (  -0.00,-104.69) (  -0.26,-105.78)  123.88                80
 09/16/2023   20:09:15   (  -0.00,-104.70) (   0.75,-101.25)  392.72                80
 09/18/2023   08:31:03   (   0.00,-104.72) (   0.40,-106.52)  205.44                80
 09/19/2023   08:09:39   (   0.00,-104.72) (  -0.61,-101.99)  310.71                80
 09/20/2023   20:31:35   (  -0.00,-104.70) (  -0.59,-107.30)  296.75                80
 09/21/2023   20:15:31   (  -0.00,-104.69) (   0.42,-102.77)  219.39                80