Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 10.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/12/2021   06:08:35   (  71.00,  85.60) 07/12/2021   06:07:29  (  71.03,  82.96)   95.77                66
 07/12/2021   06:58:20   ( -70.07,-108.16) 07/12/2021   06:57:54  ( -70.05,-108.15)    2.15                26
 07/12/2021   07:47:47   (  69.97,  59.34) 07/12/2021   07:48:39  (  69.98,  59.26)    3.34                52
 07/14/2021   22:25:20   (  70.13,-159.82) 07/14/2021   22:24:09  (  70.12,-159.82)    0.91                71
 07/14/2021   23:14:50   ( -70.02,   7.66) 07/14/2021   23:14:51  ( -70.03,   7.63)    1.69                 1
 07/15/2021   00:04:20   (  69.75, 174.92) 07/15/2021   00:05:32  (  69.75, 175.36)   16.91                72
 07/17/2021   14:41:49   (  70.08, -44.01) 07/17/2021   14:41:04  (  70.06, -43.95)    2.96                45
 07/17/2021   15:31:19   ( -69.97, 123.47) 07/17/2021   15:31:46  ( -69.97, 123.50)    1.17                27
 07/20/2021   06:08:39   ( -70.84, -94.64) 07/20/2021   06:07:31  ( -70.90, -96.84)   80.14                68
 07/20/2021   06:58:18   (  70.07,  71.86) 07/20/2021   06:58:01  (  70.05,  71.83)    3.00                17
 07/20/2021   07:47:48   ( -69.97,-120.65) 07/20/2021   07:48:43  ( -69.96,-120.72)    3.11                55
 07/22/2021   22:25:21   ( -70.13,  20.18) 07/22/2021   22:24:13  ( -70.10,  20.21)    3.05                68
 07/22/2021   23:14:48   (  70.01,-172.34) 07/22/2021   23:14:57  (  69.99,-172.31)    2.73                 9
 07/23/2021   00:04:23   ( -69.64,  -5.22) 07/23/2021   00:05:34  ( -69.63,  -4.46)   29.54                71