<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 18:10:00.000"
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 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.03.30 (089) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608903301810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="12" >
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="24" Val="99.987" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.759" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.646" Name="yE" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.996" Units="MHz" ModelName="CCIR-79" />
<Modeled Name="foF1p" Val="4.172" Units="MHz" ModelName="IRI-90" />
<Modeled Name="foF2p" Val="9.438" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.200" Description="Minimum frequency of Es-layer" Units="MHz" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
99.987 101.016 102.154 103.427 104.875
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="7">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 91.0 92.0 93.0 94.0 95.0 95.759
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.5133685 2.0343385 2.363138 2.5726862 2.6847565 2.71

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="1" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.71" PeakHeight="95.759" Num="3" Error="1.662">
-8.449 3.478 -0.788
</ShiftedChebyshev>
</ShiftedChebyshevList>
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
