Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 1.  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)
 08/02/2023   15:17:24   ( -70.85, 125.50) 08/02/2023   15:18:32  ( -70.74, 127.68)   80.46                68
 08/02/2023   16:07:54   (  70.00, -65.85) 08/02/2023   16:08:11  (  69.99, -65.78)    3.11                17
 08/02/2023   16:58:35   ( -69.86, 101.68) 08/02/2023   16:57:41  ( -69.87, 101.69)    1.60                54
 08/05/2023   07:34:03   ( -70.16,-117.62) 08/05/2023   07:35:14  ( -70.13,-117.35)   11.06                71
 08/05/2023   08:24:45   (  69.95,  50.01) 08/05/2023   08:24:43  (  69.92,  50.00)    3.33                 2
 08/05/2023   09:15:26   ( -69.80,-142.46) 08/05/2023   09:14:13  ( -69.81,-142.53)    2.72                73
 08/07/2023   23:50:52   ( -70.01,  -1.61) 08/07/2023   23:51:46  ( -70.03,  -1.61)    2.72                54
 08/08/2023   00:41:36   (  69.90, 165.86) 08/08/2023   00:41:13  (  69.93, 165.89)    3.36                23
 08/08/2023   01:32:03   ( -69.06, -25.62) 08/08/2023   01:30:55  ( -69.10, -27.59)   78.35                68
 08/10/2023   16:07:42   ( -69.97, 114.24) 08/10/2023   16:08:16  ( -69.96, 114.18)    2.21                34
 08/10/2023   16:58:26   (  69.86, -78.30) 08/10/2023   16:57:43  (  69.86, -78.32)    1.11                43
 08/13/2023   07:34:00   (  70.50,  61.87) 08/13/2023   07:35:10  (  70.36,  63.00)   45.12                70
 08/13/2023   08:24:33   ( -69.93,-129.93) 08/13/2023   08:24:46  ( -69.92,-129.99)    2.64                13
 08/13/2023   09:15:17   (  69.83,  37.54) 08/13/2023   09:14:13  (  69.81,  37.50)    2.16                64