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Table 1: Summary of major RFI contaminated regions of in the L-band rangefrequency range covered by the MeerKAT receivers.
RFI source | Frequency range (MHz) |
Digital TV (UHF) | 8 MHz “rectangular” broadband: (306 + Channel# x 8) +/- 4 MHz |
GSM (Mobile phones) (UHF + L-band) | 880 - 915 uplink* 925 - 960 downlink |
Aircraft transponders | Multiple <1 MHz bandwidth intermittent signals between 962 and 1213 MHz |
GPS | L1: 1565 - 1585 |
GLONASS | L1: 1592 - 1610 L3: 1202.025 |
Galileo | E1: 1575.42 E5a: 1176.45 E5b: 1207.14 E5 AltBOC: 1191.795 E6: 1278.75 |
Iridium | 1616 - 1626 |
Inmarsat | 1526 - 1554 |
Globalstar | 2483.5 - 2495.0 |
Wi-Fi* | 2400 - 2495 |
Bluetooth* | 2400.0 - 2483.5 |
* The GSM uplink, Wi-Fi and Bluetooth bands should be clear of RFI on the MeerKAT site and are rarely seen. We request that users who do note RFI in these bands report the frequency range and date and time by raising a helpdesk ticket under ‘RFI’.
L-band statistics
There are three major contributors to RFI in the MeerKAT L-band frequency range: Global System for Mobile Communication (GSM), Distance Measurement Equipment (DME) on aircraft and Global Navigation Satellite System (GNSS) satellites.
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