Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 4 9.  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   ( -70.83,-106.31) 04/09/2024   06:45:50  ( -70.73,-104.23)   76.79                68
 04/09/2024   07:35:12   (  69.99,  62.34) 04/09/2024   07:35:29  (  69.97,  62.30)    2.54                17
 04/09/2024   08:25:54   ( -69.89,-130.20) 04/09/2024   08:24:58  ( -69.92,-130.15)    3.25                56
 04/11/2024   23:01:24   ( -70.09,  10.65) 04/11/2024   23:02:29  ( -70.10,  10.71)    2.47                65
 04/11/2024   23:52:08   (  69.98, 178.13) 04/11/2024   23:51:56  (  69.99, 178.20)    2.97                12
 04/12/2024   00:42:43   ( -69.51, -13.86) 04/12/2024   00:41:32  ( -69.55, -14.77)   35.50                71
 04/14/2024   15:18:18   ( -70.03, 126.52) 04/14/2024   15:18:56  ( -70.03, 126.51)    0.85                38
 04/14/2024   16:09:02   (  69.92, -66.02) 04/14/2024   16:08:23  (  69.92, -66.01)    0.52                39
 04/17/2024   06:44:38   (  70.45,  74.31) 04/17/2024   06:45:49  (  70.32,  75.17)   35.13                71
 04/17/2024   07:35:13   ( -69.98,-117.63) 04/17/2024   07:35:23  ( -70.00,-117.66)    2.85                10
 04/17/2024   08:25:57   (  69.88,  49.83) 04/17/2024   08:24:50  (  69.88,  49.83)    0.92                67
 04/19/2024   23:01:26   (  70.04,-169.27) 04/19/2024   23:02:20  (  70.04,-169.34)    2.61                54
 04/19/2024   23:52:08   ( -69.93,  -1.79) 04/19/2024   23:51:50  ( -69.94,  -1.85)    2.35                18
 04/20/2024   00:42:37   (  69.04, 166.81) 04/20/2024   00:41:30  (  69.10, 164.67)   85.51                67
 04/22/2024   15:18:21   (  70.01, -53.45) 04/22/2024   15:18:46  (  70.01, -53.50)    1.91                25
 04/22/2024   16:09:03   ( -69.90, 114.03) 04/22/2024   16:08:16  ( -69.91, 114.00)    2.05                47