Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 2 20.  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)
 02/20/2023   20:10:50   (  -0.04,-104.65) (   0.70,-101.31)  381.20                80
 02/22/2023   08:32:38   (   0.04,-104.66) (   0.45,-106.59)  219.31                80
 02/23/2023   08:11:13   (   0.04,-104.67) (  -0.56,-102.06)  297.74                80
 02/24/2023   20:33:10   (  -0.04,-104.69) (  -0.63,-107.36)  304.68                80
 02/25/2023   20:17:05   (  -0.04,-104.70) (   0.39,-102.84)  212.60                80
 02/27/2023   08:38:53   (   0.05,-104.71) (   0.81,-108.10)  387.43                80
 02/28/2023   08:17:28   (   0.05,-104.71) (  -0.21,-103.58)  129.62                80
 03/01/2023   20:39:24   (  -0.06,-104.73) (  -0.97,-108.89)  473.06                80
 03/02/2023   20:23:20   (  -0.06,-104.74) (   0.06,-104.36)   44.36                80
 03/05/2023   08:26:22   (   0.07,-104.76) (   0.16,-105.09)   38.19                80
 03/06/2023   08:04:57   (   0.06,-104.77) (  -0.87,-100.57)  479.19                80