VERONmanmadenoisemeasurementcampaign

Purpose

Togaininsightinactualmanmadenoiselevelstoday

ThenumberofRFIsignals

Atasampleofradioamateursta@ons

Invarioustypesofenvironment

Focusonmanmadebroadbandnoisefromlocalsources+RFI

SetupofthemeasurementcampaignSixtypesofenvironmentaredefined:

1.  QuietRural:nohabita@on,noinfrastructureswithin2km.

2.Rural:upto10addresseswithin100m,>100mfrombuilt-uparea.

3.Residen@al1:11–50addresseswithin100m.

4.Residen@al2:51–100addresseswithin100m.

5.  Residen@al3:>100addresseswithin100m.

6.  Residen@al4:largeappartementbuildings&cutycenters.

Foreverytypeofenvironmentmeasurementsareperformedat10loca@ons.

BandsAllamateurradiobandsfrom472kHzto50MHz,including5MHz.

Timingofthemeasurements472kHz–10MHzdirectaZernoon

14–28MHzbeforenoon

50MHzfinally

Thisischoosentodiscriminatethelocalmanmadenoisefromtheskywavenoise,usingthea\enua@onbytheD-layer.

Measurementequipment

1.  Rohde&SchwarzmeasuringreceiverESH2,9kHz–30MHz

2.  Highsensi@veloopantenna472kHz–10MHz(PA0KDF)

3.  Highsensi@veloopantenna14MHz–28MHz(PA0KDF)

4.  Ac@vedipole&downconvertor50->10MHz(PA0KDF)

5.  Datalogger,basedonRaspberryPicomputer+ADCboard

Allantennasarecalibratedincoopera@onwithRadioAgencyNL

DataprocessingbythedataloggerESH2o/pvoltagedigi@zedandtranslatedintoelectricalfieldstrengthindBµV/m.

Antennafactor,antennanoisefloor,bandwidthconversionmeasurementbandwidth(500Hz)intoreferencebandwidth(2.7kHz),correc@onnumbersforaveragedetectorandlogamplifier,aretakenintoaccountofinthedataloggersoZware.

Ameasurementisdoneinaperiodof30secondsandanaverageEiscalculated.Thenantennaisrotated90°,andasecondmeasurementisdone.Thisresultsinahighestvalue,ameanvalue,andalowestvaluepermeasurementfrequency.

Twotypesofmeasurements

1.  Measurementsofthefloorofbroadbandnoiseineachband.

2.  MeasurementsofRFIsignals,broadband(>500Hz),andnarrowband(<500Hz).

Forthemeasurementsofthenoisefloor,measurementsaredoneonatleast2frequencies,dependingonthewidthoftheband.

Probandtheresultsaresavedinaplotfileandinadatafile.

Postprocessing

Acomprehensiveplotismadeshowingallthemeasurementresultsforaloca@onforallbands,andrelateittoITUmanmadenoisedata.