<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 21:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.02.01 (032) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603202012140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.790" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.718" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.950" Name="fxI" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.554" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.651" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.245" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.811" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.155" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.580" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.767" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 340.000 340.000 340.000 340.000 335.000 335.000 340.000 345.000 345.000 340.000 345.000 345.000 345.000 345.000 350.000 352.000 354.000 356.000 358.000 360.000 360.000 355.000 357.000 359.000 361.000 363.000 365.000 365.000 375.000 375.000 372.500 370.000 367.500 365.000 365.000 370.000 375.000 377.500 380.000 382.500 385.000 387.500 390.000 390.000 395.000 395.000 396.000 397.000 398.000 399.000 400.000 405.000 406.667 408.333 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 425.000 430.000 435.000 440.000 440.000 440.853 441.891 443.181 444.826 446.999 450.000 454.416 461.554 475.053 510.255
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 60 0 0 72 57 63 0 72 72 72 75 69 75 69 66 0 0 0 0 66 60 69 0 0 63 0 57 57 51 51 0 66 0 72 48 0 66 0 0 0 60 0 63 0 66 69 0 0 0 0 72 63 0 0 0 54 0 0 0 0 75 75 66 0 0 63 60 75 72 75 0 0 72 69 69 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.914 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.757 140.0 145.0 150.0 155.0 160.0 161.515 165.0 170.0 175.0 180.0 185.0 187.272 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.245 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.432 0.564 0.63 0.651 0.642 0.613 0.562 0.481 0.348 0.319 0.319 0.319 0.319 0.319 0.319 0.319 0.364 0.428 0.493 0.557 0.622 0.651 0.705 0.802 0.899 0.998 1.098 1.2 1.304 1.411 1.522 1.636 1.754 1.876 2.002 2.133 2.27 2.411 2.559 2.712 2.872 3.038 3.211 3.392 3.58 3.776 3.98 4.191 4.409 4.634 4.864 5.098 5.331 5.56 5.777 5.975 6.142 6.266 6.337 6.35 6.349 6.332 6.297 6.245 6.178 6.098 6.006 5.905 5.794 5.676 5.552 5.423 5.29 5.155 5.017 4.878 4.738 4.598 4.459 4.321 4.184 4.049 3.916 3.785 3.657 3.532 3.41 3.29 3.174 3.06 2.95 2.843 2.739 2.639 2.541 2.447 2.355 2.267 2.181 2.099 2.019 1.942 1.868 1.797 1.728 1.661 1.597 1.536 1.476 1.419 1.364 1.311 1.26 1.211 1.164 1.118 1.075 1.033 0.992 0.953 0.916 0.88 0.845 0.812 0.78 0.75 0.72 0.692 0.665 0.639 0.613 0.589 0.566 0.544 0.522 0.502 0.482 0.463 0.445 0.427 0.41 0.394 0.379 0.364 0.349 0.336 0.322 0.31 0.297 0.286 0.274 0.263 0.253 0.243 0.233 0.224 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.651" PeakHeight="110.0" Num="3" Error="0.0">
-24.208 5.794 -0.672
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.651" EndFrequency="6.35" PeakHeight="373.245" Num="5" zHalfNm="321.811" Error="1.98">
-159.271 -39.547 13.054 0.065 -0.274
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.272" Depth="0.332"/>
<TopsideChapman PeakHeight="373.245" PeakDensity="500279.16" PeakScaleHeight="38.767" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
