Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 6.  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)
 04/09/2024   06:44:42   ( -70.84,-106.32) 04/09/2024   06:45:50  ( -70.73,-104.24)   77.25                68
 04/09/2024   07:35:12   (  70.00,  62.32) 04/09/2024   07:35:28  (  70.02,  62.36)    2.51                16
 04/09/2024   08:25:54   ( -69.90,-130.21) 04/09/2024   08:24:58  ( -69.91,-130.15)    2.53                56
 04/11/2024   23:01:24   ( -70.09,  10.64) 04/11/2024   23:02:29  ( -70.10,  10.72)    2.79                65
 04/11/2024   23:52:07   (  69.94, 178.19) 04/11/2024   23:51:57  (  69.93, 178.12)    2.72                10
 04/12/2024   00:42:43   ( -69.52, -13.87) 04/12/2024   00:41:31  ( -69.61, -14.69)   33.43                72
 04/14/2024   15:18:19   ( -70.03, 126.51) 04/14/2024   15:18:57  ( -70.05, 126.52)    2.20                38
 04/14/2024   16:09:02   (  69.93, -66.02) 04/14/2024   16:08:23  (  69.93, -65.99)    1.17                39
 04/17/2024   06:44:38   (  70.45,  74.31) 04/17/2024   06:45:49  (  70.35,  75.21)   35.13                71
 04/17/2024   07:35:13   ( -69.97,-117.63) 04/17/2024   07:35:24  ( -69.97,-117.70)    2.61                11
 04/17/2024   08:25:57   (  69.87,  49.83) 04/17/2024   08:24:51  (  69.85,  49.78)    2.87                66
 04/19/2024   23:01:27   (  70.08,-169.34) 04/19/2024   23:02:20  (  70.08,-169.29)    2.09                53
 04/19/2024   23:52:09   ( -69.97,  -1.86) 04/19/2024   23:51:50  ( -69.99,  -1.79)    2.86                19
 04/20/2024   00:42:38   (  69.08, 166.75) 04/20/2024   00:41:30  (  69.14, 164.72)   80.84                68