These attributes are available in the
signal: RSSI in dBm
noise: noise level in dBm
end_epoch_ts: POSIX timestamp of the first and last bit of the packet
rate: bit rate in Mbps
mcs: MCS index
len: length of the packet, not including any PHY header such as Radiotap header.
caplen: number of bytes actually captured.
mactime: MAC layer TSF count, 64 bit integer.
ampdu_ref: AMPDU reference number if this packet was sent in a AMPDU
last_ampdu: whether this packet was the last packet in the AMPDU.