<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-09 -099 18:00:00.000"
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="1 12 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, F2x cusp not found, F2o cusp not found, One of F2 cusps was derived from the other</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" >
2026.04.09 (099) 18:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609904091800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="9" >
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.700" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="24" Val="81.415" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="82.073" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="1.866" Name="yE" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.017" Units="MHz" ModelName="CCIR-79" />
<Modeled Name="foF1p" Val="4.182" Units="MHz" ModelName="IRI-90" />
<Modeled Name="foF2p" Val="9.798" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
81.415 81.873 82.358 82.870 83.412 83.987 84.599 85.250
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
18 0 0 0 0 0 9 15
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 -2.734375 -2.734375 0.390625 2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="4">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
80.183 81.0 82.0 82.073
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.6877502 2.0583868 2.06

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="1" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.06" PeakHeight="82.073" Num="3" Error="0.417">
-2.72 1.048 -0.218
</ShiftedChebyshev>
</ShiftedChebyshevList>
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
