Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 17.  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)
 05/17/2023   07:34:37   ( -70.06,-117.51) 05/17/2023   07:35:06  ( -70.06,-117.57)    2.39                29
 05/17/2023   08:25:22   (  69.99,  49.91) 05/17/2023   08:24:33  (  69.96,  49.93)    3.03                49
 05/19/2023   23:00:52   (  70.19,-169.27) 05/19/2023   23:02:03  (  70.18,-169.16)    4.30                71
 05/19/2023   23:51:33   ( -70.06,  -1.74) 05/19/2023   23:51:33  ( -70.06,  -1.69)    1.85                 0
 05/20/2023   00:42:15   (  69.83, 165.91) 05/20/2023   00:41:02  (  69.85, 165.65)   10.30                73
 05/22/2023   15:17:45   (  70.09, -53.35) 05/22/2023   15:18:30  (  70.09, -53.40)    1.87                45
 05/22/2023   16:08:27   ( -70.01, 114.10) 05/22/2023   16:08:00  ( -69.98, 114.08)    2.69                27
 05/25/2023   06:44:10   ( -70.90,-106.18) 05/25/2023   06:45:18  ( -70.81,-104.10)   76.53                68
 05/25/2023   07:34:40   (  70.05,  62.48) 05/25/2023   07:34:57  (  70.05,  62.42)    2.37                17
 05/25/2023   08:25:22   ( -69.96,-130.07) 05/25/2023   08:24:27  ( -69.94,-130.10)    3.00                55
 05/27/2023   23:00:51   ( -70.13,  10.81) 05/27/2023   23:01:56  ( -70.14,  10.80)    1.59                65
 05/27/2023   23:51:35   (  70.02, 178.30) 05/27/2023   23:51:23  (  70.03, 178.28)    1.53                12
 05/28/2023   00:42:10   ( -69.55, -13.70) 05/28/2023   00:40:59  ( -69.59, -14.69)   38.53                71
 05/30/2023   15:17:46   ( -70.10, 126.63) 05/30/2023   15:18:22  ( -70.11, 126.63)    0.83                36
 05/30/2023   16:08:30   (  69.99, -65.90) 05/30/2023   16:07:49  (  69.99, -65.89)    0.31                41