<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 08:30:00.000"
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 2 0 0 0 0 0 0 0 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.03.16 (075) 08:30:00</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">
FF202607503160830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.440" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.352" 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="3.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="314.511" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.511" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="266.966" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.436" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.158" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="47.614" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.470" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="25.503" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="45.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="12">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 265.000 275.000 285.000 290.000 300.000 305.000 300.000 307.500 314.511 331.197 422.125
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 69 69 69 63 75 63 0 60 0 63
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="94">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.571 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.787 140.0 145.0 150.0 155.0 160.0 165.0 165.574 170.0 175.0 180.0 185.0 190.0 193.361 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.966 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.338 0.443 0.495 0.511 0.504 0.483 0.446 0.388 0.296 0.217 0.217 0.217 0.217 0.217 0.217 0.217 0.217 0.264 0.317 0.37 0.423 0.475 0.511 0.558 0.709 0.879 1.074 1.302 1.561 1.845 2.138 2.419 2.671 2.884 3.053 3.178 3.259 3.297 3.3 3.296 3.27 3.225 3.163 3.087 3.001 2.906 2.804 2.698 2.589 2.479 2.368 2.259 2.151 2.045 1.942 1.842 1.746 1.653 1.564 1.479 1.398 1.32 1.246 1.176 1.109 1.046 0.986 0.929 0.875 0.824 0.777 0.731 0.689 0.648 0.61 0.574 0.541 0.509 0.479 0.45 0.424 0.399 0.375 0.353 0.332 0.312 0.294 0.277 0.26 0.245 0.23 0.217 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.511" PeakHeight="110.0" Num="3" Error="0.0">
-22.481 4.471 -0.419
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.511" EndFrequency="3.3" PeakHeight="266.966" Num="5" zHalfNm="233.436" Error="1.793">
-76.423 4.725 -2.902 1.054 -0.059
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.361" Depth="0.294"/>
<TopsideChapman PeakHeight="266.966" PeakDensity="135111.66" PeakScaleHeight="25.503" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
