Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 4 5.  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)
 04/06/2025   22:11:37   ( -70.90,  22.23) 04/06/2025   22:12:45  ( -70.80,  24.14)   70.91                68
 04/06/2025   23:02:08   (  70.14,-169.24) 04/06/2025   23:02:22  (  70.15,-169.17)    3.01                14
 04/06/2025   23:52:50   ( -70.02,  -1.75) 04/06/2025   23:51:52  ( -70.05,  -1.69)    3.27                58
 04/09/2025   14:28:15   ( -70.26, 139.05) 04/09/2025   14:29:26  ( -70.24, 139.17)    4.88                71
 04/09/2025   15:18:57   (  70.07, -53.35) 04/09/2025   15:18:54  (  70.08, -53.41)    2.51                 3
 04/09/2025   16:09:38   ( -69.90, 114.23) 04/09/2025   16:08:25  ( -69.92, 114.00)    9.06                73
 04/12/2025   06:45:05   ( -70.20,-105.07) 04/12/2025   06:45:58  ( -70.22,-104.99)    3.49                53
 04/12/2025   07:35:48   (  70.07,  62.44) 04/12/2025   07:35:26  (  70.05,  62.42)    2.15                22
 04/12/2025   08:26:16   ( -69.21,-128.98) 04/12/2025   08:25:08  ( -69.29,-130.99)   79.63                68
 04/14/2025   23:01:55   ( -70.16,  10.78) 04/14/2025   23:02:31  ( -70.14,  10.75)    2.64                36
 04/14/2025   23:52:38   (  70.03, 178.28) 04/14/2025   23:51:58  (  70.02, 178.24)    1.95                40
 04/17/2025   14:28:15   (  70.89, -41.92) 04/17/2025   14:29:23  (  70.75, -40.11)   67.87                68
 04/17/2025   15:18:45   ( -70.13, 126.61) 04/17/2025   15:19:03  ( -70.10, 126.57)    3.30                18
 04/17/2025   16:09:28   (  70.01, -65.89) 04/17/2025   16:08:30  (  69.99, -65.94)    2.84                58