This zip file contains Juno`MAG 60sec average data in Solar RTN coordinates.
The data are stored in ASCII tables, one file per year. 
Each file has the following columns:
1) time        UTC time at Juno taken at the mid-point of the average
2) Br <nT>     Radial field component in the Sun-Juno RTN frame
3) Bt <nT>     Tangential (azimuthal) field component in the RTN frame
4) Bn <nT>     Normal (vertical)  field component in the RTN frame
5) R  <AU>     Sun-Juno range in AU where 1 AU = 1.49674e8 km
6) LAT <deg>   Solar latitude in degrees
7) LON <deg>   Inertial solar longitude, j2000 reference, in degrees.