Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 9 10.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2023   07:59:20   ( -70.01,-123.77) 09/10/2023   08:00:15  ( -70.02,-123.70)    2.78                55
 09/10/2023   08:50:04   (  69.88,  43.73) 09/10/2023   08:49:43  (  69.86,  43.73)    1.96                21
 09/10/2023   09:40:33   ( -69.11,-147.85) 09/10/2023   09:39:24  ( -69.14,-149.60)   69.79                69
 09/13/2023   00:16:15   ( -69.96,  -7.93) 09/13/2023   00:16:47  ( -69.95,  -7.91)    0.88                32
 09/13/2023   01:06:59   (  69.83, 159.57) 09/13/2023   01:06:14  (  69.85, 159.59)    2.29                45
 09/15/2023   15:42:33   (  70.32, -60.03) 09/15/2023   15:43:44  (  70.19, -59.33)   29.85                71
 09/15/2023   16:33:09   ( -69.92, 107.90) 09/15/2023   16:33:17  ( -69.92, 107.92)    0.86                 8
 09/15/2023   17:23:53   (  69.79, -84.61) 09/15/2023   17:22:44  (  69.81, -84.58)    2.49                69
 09/18/2023   07:59:22   (  69.97,  56.27) 09/18/2023   08:00:18  (  69.97,  56.23)    1.59                56
 09/18/2023   08:50:04   ( -69.89,-136.29) 09/18/2023   08:49:48  ( -69.86,-136.29)    2.68                16
 09/18/2023   09:40:35   (  69.07,  32.19) 09/18/2023   09:39:27  (  69.09,  30.32)   74.31                68
 09/21/2023   00:16:17   (  69.95, 172.06) 09/21/2023   00:16:48  (  69.93, 172.06)    2.06                31
 09/21/2023   01:06:58   ( -69.81, -20.41) 09/21/2023   01:06:18  ( -69.83, -20.45)    2.81                40
 09/23/2023   15:42:35   ( -70.42, 119.80) 09/23/2023   15:43:45  ( -70.32, 120.85)   40.91                70
 09/23/2023   16:33:11   (  69.89, -72.07) 09/23/2023   16:33:18  (  69.87, -72.14)    3.07                 7
 09/23/2023   17:23:53   ( -69.79,  95.38) 09/23/2023   17:22:48  ( -69.77,  95.35)    2.79                65