ER_INIT;
MTKt_DataBuffer land_brf_sigma = MTKT_DATABUFFER_INIT;
MTKt_DataBuffer land_brf_mask = MTKT_DATABUFFER_INIT;
MTKt_MapInfo    land_brf_map_info = MTKT_MAPINFO_INIT;
MTKt_RegressionCoeff regression_coeff = MTKT_REGRESSION_COEFF_INIT;
MTKt_MapInfo    regression_coeff_map_info = MTKT_MAPINFO_INIT;
MTKt_Region region = MTKT_REGION_INIT;

status = MtkSetRegionByPathBlockRange(39, 50, 60, &ampregion);
status = MtkReadData("MISR_AM1_GRP_TERRAIN_GM_P161_O012115_DF_F03_0021.hdf", "BlueBand", "Blue Radiance/R