This file gives the (symmetric) covariance matrix of GRGM900C, truncated at L=50, in ASCII format. 
Each line gives the matrix elements along each row, with the same parameter ordering as for the "gggrx_0900c_shb_l50_coefficients.asc" file. 
There are 2599 lines/rows/parameters, and the format is " %25.16e" repeated 2599 times. Line feed and carriage return characters complete the line (DOS format).