<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 23:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.14 (073) 23:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202607303142330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="18" >
<URSI ID="00" Val="8.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.928" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.764" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.907" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.762" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 395.000 390.000 385.000 380.000 381.000 382.000 383.000 384.000 385.000 387.500 390.000 390.000 392.500 395.000 395.500 396.000 396.500 397.000 397.500 398.000 398.500 399.000 399.500 400.000 400.000 397.500 395.000 390.000 395.000 390.000 380.000 377.500 375.000 370.000 370.000 365.000 365.000 365.000 365.000 366.667 368.333 370.000 370.000 370.500 371.000 371.500 372.000 372.500 373.000 373.500 374.000 374.500 375.000 372.500 370.000 369.167 368.333 367.500 366.667 365.833 365.000 365.000 365.000 363.333 361.667 360.000 358.750 357.500 356.250 355.000 355.000 355.000 355.000 355.000 351.250 347.500 343.750 340.000 347.500 355.000 345.000 344.643 344.286 343.929 343.571 343.214 342.857 342.500 342.143 341.786 341.429 341.071 340.714 340.357 340.000 342.500 345.000 350.000 354.063 358.125 362.188 366.250 370.313 374.375 378.438 382.500 386.563 390.625 394.688 398.750 402.813 406.875 410.938 415.000 416.422 418.302 420.907 424.755 431.013 442.979 475.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 60 0 57 54 0 0 60 51 0 63 57 57 57 0 54 0 0 0 0 0 48 0 57 51 0 48 57 60 60 60 57 57 60 60 54 0 54 57 0 0 57 51 0 0 0 0 51 57 0 0 0 54 0 57 0 0 60 0 0 60 0 57 0 0 57 0 0 0 54 0 0 0 57 0 0 0 54 0 54 57 0 57 54 0 0 0 0 0 0 0 0 0 0 51 51 54 57 0 0 48 0 0 54 0 54 0 0 0 48 51 48 0 48 0 0 45 48 0 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 -1.171875 -1.171875 1.953125 -0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 -0.390625 2.734375 0.390625 1.171875 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 1.953125 1.171875 -2.734375 1.171875 1.171875 1.171875 -1.953125 1.171875 1.171875 1.171875 0.390625 0.390625 1.953125 1.953125 1.953125 0.390625 1.171875 1.953125 1.171875 1.953125 -1.171875 1.171875 1.171875 -1.171875 1.953125 -1.953125 -1.171875 -2.734375 1.953125 1.953125 1.953125 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 0.390625 -0.390625 -1.171875 -0.390625 -1.953125 1.171875 1.953125 -1.171875 -2.734375 1.171875 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
