Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 17.  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)
 04/17/2024   06:44:37   (  70.42,  74.37) 04/17/2024   06:45:48  (  70.33,  75.19)   32.13                71
 04/17/2024   07:35:13   ( -70.00,-117.68) 04/17/2024   07:35:22  ( -70.00,-117.65)    0.94                 9
 04/17/2024   08:25:57   (  69.89,  49.80) 04/17/2024   08:24:49  (  69.89,  49.84)    1.56                68
 04/19/2024   23:01:26   (  70.08,-169.34) 04/19/2024   23:02:17  (  70.08,-169.28)    2.22                51
 04/19/2024   23:52:08   ( -69.99,  -1.87) 04/19/2024   23:51:47  ( -69.97,  -1.80)    3.01                21
 04/20/2024   00:42:35   (  68.97, 166.90) 04/20/2024   00:41:29  (  69.03, 164.58)   92.67                66
 04/22/2024   15:18:20   (  70.03, -53.48) 04/22/2024   15:18:41  (  70.04, -53.44)    1.88                21
 04/22/2024   16:09:02   ( -69.93, 113.99) 04/22/2024   16:08:11  ( -69.93, 114.04)    1.98                51
 04/25/2024   06:44:29   ( -70.10,-105.12) 04/25/2024   06:45:36  ( -70.11,-105.09)    1.47                67
 04/25/2024   07:35:13   (  70.00,  62.35) 04/25/2024   07:35:03  (  69.99,  62.39)    1.75                10
 04/25/2024   08:25:49   ( -69.58,-129.71) 04/25/2024   08:24:37  ( -69.66,-130.43)   29.39                72
 04/27/2024   23:01:22   ( -70.03,  10.77) 04/27/2024   23:01:58  ( -70.05,  10.74)    2.85                36
 04/27/2024   23:52:06   (  69.93, 178.23) 04/27/2024   23:51:25  (  69.93, 178.21)    0.81                41
 04/30/2024   14:27:36   (  70.24, -41.09) 04/30/2024   14:28:47  (  70.20, -40.77)   12.71                71
 04/30/2024   15:18:15   ( -69.98, 126.63) 04/30/2024   15:18:19  ( -69.98, 126.56)    3.13                 4
 04/30/2024   16:08:59   (  69.88, -65.91) 04/30/2024   16:07:46  (  69.86, -65.97)    3.17                73