I receive a beacon signal from the same location with different antennas.
Simple complete antenna and directional antenna designed for 1090MHz
Simple antenna
Directional antenna
The difference in the received signal is 8 dBFS. How to interpret this?
Wed Feb 3 17:31:54 2021 MSK dump1090-mutability v1.15-dev-334-g0ec2dd8 starting up.
Using sample converter: UC8, integer/table path
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000002 (currently selected)
Found Rafael Micro R820T tuner
Max available gain is: 49.60 dB
Setting gain to: 49.60 dB
Gain reported by device: 49.60 dB
Simple antenna:
*91202002b82100003318f6d45ff5;
CRC: 000000
RSSI: -17.4 dBFS
Score: 1400
Time: 15825143.50us
DF:18 AA:202002 CF:1 ME:B82100003318F6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
*91202002b8110000331af6c1f344;
CRC: 000000
RSSI: -18.7 dBFS
Score: 1400
Time: 25321720.92us
DF:18 AA:202002 CF:1 ME:B8110000331AF6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
Directional antenna
*91202002b8210000338af6d18cd1;
CRC: 000000
RSSI: -10.1 dBFS
Score: 1400
Time: 421800624.67us
DF:18 AA:202002 CF:1 ME:B8210000338AF6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
*91202002b8110000338af6d83b60;
CRC: 000000
RSSI: -12.2 dBFS
Score: 1400
Time: 423288718.08us
DF:18 AA:202002 CF:1 ME:B8110000338AF6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
*91202002b8110000338bf6d636e0;
CRC: 000000
RSSI: -12.3 dBFS
Score: 1400
Time: 427296969.67us
DF:18 AA:202002 CF:1 ME:B8110000338BF6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
*91202002b821000033d2f63db0c3;
CRC: 000000
RSSI: -12.5 dBFS
Score: 1400
Time: 709850715.67us
DF:18 AA:202002 CF:1 ME:B821000033D2F6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)
*91202002b811000033d2f6340772;
CRC: 000000
RSSI: -11.9 dBFS
Score: 1400
Time: 711338809.17us
DF:18 AA:202002 CF:1 ME:B811000033D2F6
Extended Squitter (Non-Transponder) Test message (23/0)
Other Address: 202002 (ADS-B, other addressing scheme)