Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 27.  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)
 07/28/2023   07:34:11   (  70.04,  62.52) 07/28/2023   07:35:08  (  70.03,  62.53)    1.53                57
 07/28/2023   08:24:52   ( -69.90,-129.94) 07/28/2023   08:24:38  ( -69.91,-130.00)    2.87                14
 07/28/2023   09:15:24   (  69.15,  38.45) 07/28/2023   09:14:16  (  69.21,  36.69)   70.00                68
 07/30/2023   23:51:03   (  70.03, 178.33) 07/30/2023   23:51:40  (  70.01, 178.38)    2.62                37
 07/31/2023   00:41:44   ( -69.88, -14.14) 07/31/2023   00:41:10  ( -69.90, -14.15)    2.03                34
 08/02/2023   15:17:24   ( -70.86, 125.48) 08/02/2023   15:18:31  ( -70.78, 127.74)   83.01                67
 08/02/2023   16:07:53   (  69.97, -65.80) 08/02/2023   16:08:11  (  69.97, -65.81)    0.24                18
 08/02/2023   16:58:35   ( -69.87, 101.66) 08/02/2023   16:57:41  ( -69.86, 101.67)    1.53                54
 08/05/2023   07:34:03   ( -70.18,-117.65) 08/05/2023   07:35:14  ( -70.11,-117.37)   12.54                71
 08/05/2023   08:24:45   (  69.97,  49.98) 08/05/2023   08:24:42  (  69.95,  50.05)    3.12                 3
 08/05/2023   09:15:26   ( -69.82,-142.48) 08/05/2023   09:14:12  ( -69.85,-142.47)    3.18                74
 08/07/2023   23:50:52   ( -70.02,  -1.63) 08/07/2023   23:51:46  ( -70.02,  -1.63)    0.56                54
 08/08/2023   00:41:36   (  69.92, 165.83) 08/08/2023   00:41:13  (  69.91, 165.87)    2.05                23