df = pd.read_table('yourfile.csv', header=None, delim_whitespace=True, skiprows=1)
df.columns = ['0','POSITION_T','PROB','ID']
del df['0']

# filtering out the rows with `POSITION_T` value in corresponding column
df = df[df.POSITION_T.str.contains('POSITION_T') == False]

print(df)