Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 9 18.  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)
 09/18/2025   19:24:24   (   0.24, -89.51) (   0.07, -90.17)   76.02                80
 09/19/2025   19:08:19   (   0.24, -89.52) (   1.13, -85.65)  441.09                80
 09/21/2025   07:30:05   (  -0.24, -89.48) (   0.11, -90.91)  162.75                80
 09/22/2025   07:08:41   (  -0.24, -89.49) (  -0.96, -86.38)  354.42                80
 09/23/2025   19:30:35   (   0.24, -89.54) (  -0.26, -91.67)  243.63                80
 09/24/2025   19:14:31   (   0.24, -89.55) (   0.80, -87.15)  273.99                80
 09/26/2025   07:36:17   (  -0.23, -89.52) (   0.42, -92.40)  328.75                80
 09/27/2025   07:14:52   (  -0.24, -89.53) (  -0.59, -87.87)  188.46                80
 09/28/2025   19:39:27   (   0.23, -89.57) (  -0.57, -93.17)  410.05                80
 09/29/2025   19:20:41   (   0.24, -89.58) (   0.44, -88.64)  107.55                80
 10/01/2025   07:42:29   (  -0.23, -89.57) (   0.72, -93.91)  494.28                80