Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 4.  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)
 07/06/2023   23:00:48   (  70.49,-169.76) 07/06/2023   23:01:58  (  70.42,-168.70)   40.42                70
 07/06/2023   23:51:22   ( -69.97,  -1.64) 07/06/2023   23:51:34  ( -69.97,  -1.70)    2.20                12
 07/07/2023   00:42:06   (  69.86, 165.83) 07/07/2023   00:41:01  (  69.87, 165.80)    1.55                65
 07/09/2023   15:17:32   (  70.05, -53.30) 07/09/2023   15:18:34  (  70.07, -53.33)    2.32                62
 07/09/2023   16:08:14   ( -69.95, 114.17) 07/09/2023   16:08:04  ( -69.96, 114.15)    0.88                10
 07/09/2023   16:58:49   (  69.37, -77.67) 07/09/2023   16:57:39  (  69.41, -78.95)   50.52                70
 07/12/2023   07:34:25   (  70.03,  62.50) 07/12/2023   07:35:05  (  70.02,  62.49)    1.08                40
 07/12/2023   08:25:07   ( -69.93,-130.03) 07/12/2023   08:24:35  ( -69.92,-130.02)    1.75                32
 07/14/2023   23:00:49   ( -70.91,   9.57) 07/14/2023   23:01:56  ( -70.78,  11.85)   84.14                67
 07/14/2023   23:51:18   (  70.02, 178.29) 07/14/2023   23:51:35  (  70.02, 178.37)    3.04                17
 07/15/2023   00:41:59   ( -69.87, -14.16) 07/15/2023   00:41:06  ( -69.86, -14.23)    2.83                53
 07/17/2023   15:17:27   ( -70.12, 126.61) 07/17/2023   15:18:38  ( -70.10, 126.72)    4.51                71
 07/17/2023   16:08:10   (  69.97, -65.85) 07/17/2023   16:08:05  (  69.99, -65.79)    3.21                 5
 07/17/2023   16:58:50   ( -69.76, 101.78) 07/17/2023   16:57:37  ( -69.78, 101.55)    9.38                73