smap卫星 h5文件怎么打开

smap卫星 h5文件怎么打开

clear;
clc;
% Open the HDF5 File.
FILE_NAME = 'SMAP_L1B_TB_01767_A_20150601T084152_R13080_001.h5';
file_id = H5F.open (FILE_NAME, 'H5F_ACC_RDONLY', 'H5P_DEFAULT');

% Open the dataset.
DATAFIELD_NAME = 'Brightness_Temperature/tb_h';
data_id = H5D.open(file_id, DATAFIELD_NAME);

Lat_NAME='Brightness_Temperature/tb_lat';
lat_id=H5D.open(file_id, Lat_NAME);

Lon_NAME='Brightness_Temperature/tb_lon';
lon_id=H5D.open(file_id, Lon_NAME);

% Read the dataset.
data=H5D.read (data_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL', 'H5P_DEFAULT');

lat=H5D.read(lat_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL', 'H5P_DEFAULT');

lon=H5D.read(lon_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL', 'H5P_DEFAULT');

% Read the fill value.
ATTRIBUTE = '_FillValue';
attr_id = H5A.open_name (data_id, ATTRIBUTE);
fillvalue=H5A.read (attr_id, 'H5T_NATIVE_DOUBLE');

% Read the units.
ATTRIBUTE = 'units';
attr_id = H5A.open_name (data_id, ATTRIBUTE);
units = H5A.read(attr_id, 'H5ML_DEFAULT');

% Read the valid_max.
ATTRIBUTE = 'valid_max';
attr_id = H5A.open_name (data_id, ATTRIBUTE);
valid_max = H5A.read(attr_id, 'H5ML_DEFAULT');

% Read the valid_min.
ATTRIBUTE = 'valid_min';
attr_id = H5A.open_name (data_id, ATTRIBUTE);
valid_min = H5A.read(attr_id, 'H5ML_DEFAULT');

% Read title attribute.
ATTRIBUTE = 'long_name';
attr_id = H5A.open_name (data_id, ATTRIBUTE);
long_name=H5A.read (attr_id, 'H5ML_DEFAULT');

% Close and release resources.
H5A.close (attr_id)
H5D.close (data_id);
H5F.close (file_id);

% Replace the fill value with NaN.
data(data==fillvalue) = NaN;

% Replace the invalid range values with NaN.
data(data < double(valid_min)) = NaN;
data(data > double(valid_max)) = NaN;

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