<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 03:50:00.000"
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="14.0">
<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" >
2026.10.31 (304) 03:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630410310350009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="6.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.577" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="532.217" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.296" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 337.500 325.000 320.000 315.000 305.000 295.000 293.750 292.500 291.250 290.000 290.000 290.000 290.000 325.833 361.667 397.500 433.333 469.167 505.000 501.667 498.333 495.000 490.000 485.000 480.000 475.000 460.000 457.500 455.000 490.000 475.000 460.000 445.000 450.000 452.500 455.000 457.667 460.333 463.000 465.667 468.333 471.000 473.667 476.333 479.000 481.667 484.333 487.000 489.667 492.333 495.000 500.000 500.000 502.500 505.000 510.000 514.449 519.531 525.389 532.217 540.277
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 66 60 0 0 0 0 0 0 78 0 75 0 0 0 0 0 0 0 0 0 54 0 0 0 60 0 0 60 60 57 0 60 57 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 57 57 0 54 51 51 0 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 -0.390625 1.171875 -1.171875 -1.171875 -0.390625 1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 -0.390625 0.390625 1.953125 1.953125 -1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 -1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
