_foam: helford_hex_mean_p_rms
_foam: helford_hex_mean_temp
_foam: helford_hex_mean_turbid
_foam: helford_hex_mean_pm1
_foam: helford_hex_mean_pm25
_foam: helford_hex_mean_pm10
_foam: helford_hex_mean_tol_cf_125hz
_foam: helford_hex_mean_small_boats
_foam: helford_hex_mean_big_boats
_foam: helford_hex_mean_large_ships
_foam: falmouth_hex_mean_temp
_foam: falmouth_hex_mean_turbid
_foam: falmouth_hex_mean_pm1
_foam: falmouth_hex_mean_pm25
_foam: falmouth_hex_mean_pm10