<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-05 -064 01:00:00.000"
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="2 2 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 0% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.05 (064) 01:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606403050100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.084" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.357" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="363.191" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="348.562" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.040" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="25.212" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.111" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.843" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="50.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 345.000 365.000 365.000 385.000 390.000 400.000 405.000 406.250 407.500 408.750 410.000 440.000 425.000 430.000 435.000 437.500 440.000 437.273 434.545 431.818 429.091 426.364 423.636 420.909 418.182 415.455 412.727 410.000 407.273 404.545 401.818 399.091 396.364 393.636 390.909 388.182 385.455 382.727 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 375.000 372.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 374.167 373.333 375.000 380.000 385.000 385.000 390.000 395.000 409.120
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 0 57 60 60 54 54 54 0 0 51 54 57 0 57 0 54 0 54 0 0 0 0 48 0 0 0 0 0 51 57 0 0 0 0 57 0 0 60 57 60 0 0 57 54 57 0 0 0 54 0 0 0 63 63 0 60 57 0 0 57 60 60 60 0 0 63 57 57 60 57 54 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 1.171875 1.953125 2.734375 1.953125 0.390625 1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -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 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 1.953125 -1.953125 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="87">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.796 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.591 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.387 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.191 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.262 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.227 0.248 0.269 0.29 0.311 0.331 0.352 0.354 0.444 0.554 0.671 0.789 0.909 1.03 1.154 1.279 1.408 1.54 1.676 1.817 1.962 2.113 2.271 2.435 2.607 2.787 2.977 3.178 3.392 3.621 3.868 4.136 4.433 4.768 5.161 5.666 6.6 6.583 6.38 6.011 5.545 5.034 4.517 4.016 3.548 3.118 2.73 2.384 2.077 1.807 1.57 1.363 1.182 1.025 0.889 0.77 0.667 0.578 0.5 0.433 0.375 0.325 0.281 0.244 0.211

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.6" PeakHeight="363.191" Num="5" zHalfNm="348.562" Error="15.425">
-98.951 -70.995 33.452 -6.31 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.387" Depth="0.154"/>
<TopsideChapman PeakHeight="363.191" PeakDensity="540446.6" PeakScaleHeight="10.843" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
