Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 05/19/2025   14:28:23   (  70.20, -40.93) 05/19/2025   14:29:03  (  70.18, -40.90)    2.34                40
 05/19/2025   15:19:04   ( -70.07, 126.60) 05/19/2025   15:18:33  ( -70.06, 126.56)    1.47                31
 05/22/2025   05:54:47   ( -70.86, -93.53) 05/22/2025   05:55:55  ( -70.76, -91.82)   63.81                68
 05/22/2025   06:45:20   (  70.16,  74.90) 05/22/2025   06:45:31  (  70.17,  74.95)    2.21                11
 05/22/2025   07:36:01   ( -70.03,-117.58) 05/22/2025   07:35:01  ( -70.05,-117.58)    2.81                60
 05/24/2025   22:11:32   ( -70.25,  23.21) 05/24/2025   22:12:31  ( -70.23,  23.28)    3.52                59
 05/24/2025   23:02:16   (  70.12,-169.28) 05/24/2025   23:01:58  (  70.13,-169.22)    2.21                18
 05/24/2025   23:52:47   ( -69.46,  -0.98) 05/24/2025   23:51:37  ( -69.52,  -2.43)   56.72                70
 05/27/2025   14:28:28   ( -70.17, 139.10) 05/27/2025   14:28:59  ( -70.17, 139.07)    1.07                31
 05/27/2025   15:19:12   (  70.04, -53.39) 05/27/2025   15:18:26  (  70.06, -53.44)    2.79                46
 05/30/2025   05:54:44   (  70.28,  87.37) 05/30/2025   05:55:56  (  70.24,  87.42)    4.70                72
 05/30/2025   06:45:25   ( -70.15,-105.11) 05/30/2025   06:45:26  ( -70.13,-105.10)    1.93                 1
 05/30/2025   07:36:07   (  69.91,  62.56) 05/30/2025   07:34:54  (  69.96,  62.31)   11.23                73