<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 05:50:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, 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" >
2026.03.11 (070) 05:50:00</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">
FF202607003110550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.991" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.042" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="1.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="391.632" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="345.050" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="292.614" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.148" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.108" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.186" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.687" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.65 6.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 290.000 287.500 285.000 290.000 285.000 285.000 286.667 288.333 290.000 285.000 290.000 290.000 292.500 295.000 300.000 300.000 300.000 305.000 300.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 312.500 315.000 320.000 325.000 330.000 350.000 360.000 360.000 365.000 365.000 370.000 375.000 380.000 385.000 385.000 385.000 380.000 375.000 381.667 388.333 350.000 350.000 353.571 357.143 360.714 364.286 367.857 371.429 375.000 378.017 381.642 386.078 391.632 398.789 408.358 421.805 442.090 476.204 545.600
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 75 0 81 72 0 75 0 0 69 69 63 66 63 81 78 78 69 72 63 69 72 72 0 60 0 66 0 69 0 0 60 60 54 54 0 60 60 0 54 51 60 54 54 57 48 60 63 63 54 0 63 60 63 0 63 60 66 57 60 57 0 0 51 0 0
</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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 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 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 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="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.253 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.507 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.76 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.05 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</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 0.211 0.232 0.253 0.274 0.296 0.317 0.338 0.354 0.378 0.483 0.607 0.752 0.922 1.125 1.365 1.649 1.981 2.36 2.779 3.223 3.675 4.116 4.532 4.917 5.264 5.572 5.842 6.073 6.267 6.424 6.545 6.631 6.683 6.7 6.7 6.69 6.661 6.615 6.552 6.476 6.387 6.287 6.178 6.061 5.936 5.806 5.672 5.534 5.393 5.251 5.107 4.963 4.819 4.676 4.533 4.393 4.254 4.117 3.983 3.851 3.722 3.596 3.473 3.353 3.236 3.122 3.011 2.904 2.8 2.699 2.601 2.506 2.414 2.325 2.239 2.156 2.076 1.999 1.924 1.852 1.783 1.716 1.651 1.588 1.528 1.47 1.415 1.361 1.309 1.259 1.211 1.165 1.121 1.078 1.036 0.997 0.959 0.922 0.887 0.853 0.82 0.788 0.758 0.729 0.701 0.674 0.648 0.623 0.599 0.576 0.554 0.532 0.512 0.492 0.473 0.455 0.438 0.421 0.404 0.389 0.374 0.359 0.346 0.332 0.319 0.307 0.295 0.284 0.273 0.262 0.252 0.243 0.233 0.224 0.216 0.207

</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="6.7" PeakHeight="345.05" Num="5" zHalfNm="292.614" Error="4.158">
-138.681 18.824 -9.101 3.019 -0.351
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.76" Depth="0.154"/>
<TopsideChapman PeakHeight="345.05" PeakDensity="556947.9" PeakScaleHeight="39.687" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
