Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 12.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2021   00:24:13   (  68.73, 172.06) 07/14/2021   00:25:22  (  68.70, 172.01)    3.40                69
 07/14/2021   01:14:54   ( -68.59, -20.45) 07/14/2021   01:14:52  ( -68.59, -20.49)    1.84                 2
 07/14/2021   02:05:34   (  68.25, 147.31) 07/14/2021   02:04:22  (  68.31, 146.81)   21.75                72
 07/16/2021   16:41:09   (  68.67, -72.10) 07/16/2021   16:41:48  (  68.69, -72.13)    2.77                39
 07/16/2021   17:31:51   ( -68.58,  95.33) 07/16/2021   17:31:18  ( -68.58,  95.38)    1.86                33
 07/19/2021   08:07:31   ( -69.27,-124.46) 07/19/2021   08:08:41  ( -69.12,-123.34)   47.03                70
 07/19/2021   08:58:06   (  68.66,  43.68) 07/19/2021   08:58:14  (  68.67,  43.73)    2.56                 8
 07/19/2021   09:48:47   ( -68.52,-148.82) 07/19/2021   09:47:45  ( -68.51,-148.83)    1.27                62
 07/22/2021   00:24:18   ( -68.73,  -7.96) 07/22/2021   00:25:14  ( -68.71,  -7.98)    1.94                56
 07/22/2021   01:15:02   (  68.60, 159.52) 07/22/2021   01:14:41  (  68.59, 159.52)    1.59                21
 07/22/2021   02:05:31   ( -67.82, -32.16) 07/22/2021   02:04:22  ( -67.88, -33.70)   64.66                69
 07/24/2021   15:50:48   (  69.67, -60.83) 07/24/2021   15:51:55  (  69.56, -58.63)   85.96                67
 07/24/2021   16:41:13   ( -68.67, 107.89) 07/24/2021   16:41:39  ( -68.68, 107.87)    1.56                26
 07/24/2021   17:31:57   (  68.55, -84.65) 07/24/2021   17:31:06  (  68.56, -84.63)    1.22                51