<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 00:30:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.01 (060) 00:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003010030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.116" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.045" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.160" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="340.437" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="308.872" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="47.562" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.287" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.287" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="52.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 365.000 370.000 360.000 355.000 350.000 345.000 365.000 355.000 360.000 359.412 358.824 358.235 357.647 357.059 356.471 355.882 355.294 354.706 354.118 353.529 352.941 352.353 351.765 351.176 350.588 350.000 365.000 367.500 370.000 370.000 370.000 375.000 375.000 380.000 365.000 365.257 365.541 365.859 366.217 366.621 367.083 367.614 368.233 368.963 369.836 370.900 372.224 373.918 376.160 379.270 383.872 391.377 405.801 444.885
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 60 60 66 0 69 63 63 0 57 0 0 63 0 54 0 60 66 0 60 66 57 51 63 0 0 48 60 60 66 0 0 60 0 54 0 57 0 57 0 0 0 0 0 0 0 51 63 0 69 63 66 66 66 69 60 60 60 63 54 63 57 57 57 57 60 57 60 54 63 57 0 57 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 2.734375 1.953125 -0.390625 -1.953125 -0.390625 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -0.390625 -1.953125 2.734375 -1.953125 -1.171875 1.171875 1.171875 -1.953125 -1.953125 2.734375 2.734375 1.171875 -1.953125 -0.390625 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 0.390625 -1.953125 -0.390625 -1.171875 -0.390625 -1.953125 -0.390625 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="119">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.277 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.553 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.83 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.437 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0
</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 0.315 0.291 0.259 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.232 0.253 0.274 0.295 0.317 0.338 0.354 0.382 0.504 0.647 0.82 1.031 1.282 1.569 1.887 2.228 2.588 2.964 3.354 3.757 4.174 4.605 5.05 5.51 5.985 6.476 6.979 7.491 7.997 8.467 8.836 8.999 9.0 8.968 8.865 8.702 8.49 8.24 7.959 7.657 7.34 7.015 6.685 6.356 6.031 5.711 5.4 5.099 4.809 4.53 4.264 4.01 3.768 3.539 3.322 3.117 2.923 2.74 2.568 2.406 2.254 2.111 1.976 1.85 1.732 1.621 1.517 1.419 1.328 1.242 1.162 1.087 1.017 0.951 0.89 0.832 0.778 0.728 0.681 0.637 0.595 0.557 0.521 0.487 0.455 0.426 0.398 0.372 0.348 0.326 0.305 0.285 0.266 0.249 0.233 0.218 0.204

</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="9.0" PeakHeight="340.437" Num="5" zHalfNm="308.872" Error="2.199">
-111.129 -19.616 13.495 -5.954 1.597
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.83" Depth="0.154"/>
<TopsideChapman PeakHeight="340.437" PeakDensity="1004962.75" PeakScaleHeight="23.287" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
