Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 9 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)
 09/21/2025   07:30:06   (  -0.24, -89.48) (   0.08, -90.91)  162.78                80
 09/22/2025   07:08:40   (  -0.24, -89.49) (  -0.93, -86.37)  354.27                80
 09/23/2025   19:30:36   (   0.24, -89.53) (  -0.23, -91.68)  244.04                80
 09/24/2025   19:14:30   (   0.24, -89.54) (   0.78, -87.14)  273.46                80
 09/26/2025   07:36:18   (  -0.23, -89.52) (   0.39, -92.41)  329.30                80
 09/27/2025   07:14:52   (  -0.24, -89.52) (  -0.62, -87.88)  187.82                80
 09/28/2025   19:39:26   (   0.23, -89.56) (  -0.59, -93.17)  410.93                80
 09/29/2025   19:18:02   (   0.24, -89.57) (   0.48, -88.64)  106.63                80
 10/01/2025   07:42:28   (  -0.23, -89.55) (   0.73, -93.90)  495.25                80
 10/02/2025   07:21:03   (  -0.24, -89.56) (  -0.28, -89.37)   22.03                80
 10/04/2025   19:24:13   (   0.24, -89.62) (   0.15, -90.14)   58.63                80