Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 19.  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)
 08/21/2023   07:34:01   ( -70.72,-118.47) 08/21/2023   07:35:09  ( -70.65,-116.58)   70.09                68
 08/21/2023   08:24:33   (  69.97,  50.01) 08/21/2023   08:24:47  (  69.95,  50.05)    2.59                14
 08/21/2023   09:15:14   ( -69.83,-142.46) 08/21/2023   09:14:17  ( -69.83,-142.48)    1.01                57
 08/23/2023   23:50:45   ( -70.04,  -1.65) 08/23/2023   23:51:52  ( -70.03,  -1.61)    2.19                67
 08/24/2023   00:41:29   (  69.92, 165.84) 08/24/2023   00:41:19  (  69.92, 165.89)    1.85                10
 08/24/2023   01:32:05   ( -69.52, -26.25) 08/24/2023   01:30:53  ( -69.60, -26.93)   28.07                72
 08/26/2023   16:07:41   ( -70.01, 114.16) 08/26/2023   16:08:24  ( -69.98, 114.20)    3.22                43
 08/26/2023   16:58:24   (  69.89, -78.35) 08/26/2023   16:57:50  (  69.88, -78.30)    2.54                34
 08/29/2023   07:34:06   (  70.71,  61.50) 08/29/2023   07:35:14  (  70.62,  63.37)   69.63                68
 08/29/2023   08:24:35   ( -69.94,-129.96) 08/29/2023   08:24:55  ( -69.91,-130.02)    3.37                20
 08/29/2023   09:15:19   (  69.82,  37.52) 08/29/2023   09:14:22  (  69.80,  37.47)    2.84                57
 08/31/2023   23:50:49   (  70.02, 178.35) 08/31/2023   23:51:55  (  70.02, 178.38)    1.17                66
 09/01/2023   00:41:31   ( -69.93, -14.19) 09/01/2023   00:41:25  ( -69.92, -14.12)    2.41                 6
 09/01/2023   01:32:09   (  69.49, 153.76) 09/01/2023   01:30:57  (  69.53, 152.98)   30.43                72