<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 08:40:00.000"
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 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" >
2026.02.01 (032) 08:40:00</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">
FF202603202010840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.059" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.081" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="355.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.638" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="317.767" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.978" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.971" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.273" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.205" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 272.500 275.000 277.500 280.000 285.000 290.000 295.000 300.000 305.000 303.333 301.667 300.000 305.000 320.000 332.500 345.000 350.000 355.000 370.000 355.000 370.000 375.000 390.000 420.000 447.302 512.229
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 60 0 66 72 66 57 66 72 0 69 69 63 63 0 69 69 72 72 60 66 66 63 54 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 2.734375 -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 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="169">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.96 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.957 140.0 145.0 150.0 155.0 160.0 161.915 165.0 170.0 175.0 180.0 185.0 187.872 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 317.767 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.423 0.553 0.618 0.638 0.629 0.601 0.551 0.473 0.344 0.308 0.308 0.308 0.308 0.308 0.308 0.308 0.347 0.411 0.474 0.538 0.601 0.638 0.676 0.776 0.89 1.016 1.156 1.312 1.485 1.679 1.894 2.129 2.374 2.614 2.837 3.033 3.204 3.349 3.474 3.579 3.667 3.742 3.803 3.852 3.891 3.92 3.939 3.949 3.95 3.949 3.943 3.931 3.912 3.889 3.86 3.827 3.789 3.748 3.703 3.655 3.605 3.552 3.497 3.44 3.381 3.322 3.261 3.199 3.136 3.073 3.01 2.947 2.883 2.82 2.757 2.695 2.633 2.571 2.51 2.45 2.39 2.331 2.274 2.217 2.161 2.106 2.051 1.998 1.946 1.895 1.845 1.796 1.749 1.702 1.656 1.611 1.568 1.525 1.483 1.443 1.403 1.364 1.326 1.29 1.254 1.219 1.185 1.152 1.119 1.088 1.057 1.027 0.998 0.97 0.943 0.916 0.89 0.865 0.84 0.816 0.793 0.77 0.748 0.727 0.706 0.686 0.666 0.647 0.629 0.611 0.593 0.576 0.56 0.543 0.528 0.513 0.498 0.484 0.47 0.456 0.443 0.43 0.418 0.406 0.394 0.383 0.372 0.361 0.351 0.34 0.331 0.321 0.312 0.303 0.294 0.286 0.277 0.269 0.262 0.254 0.247 0.239 0.233 0.226 0.219 0.213 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.638" PeakHeight="110.0" Num="3" Error="0.0">
-24.079 5.69 -0.651
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.638" EndFrequency="3.95" PeakHeight="317.767" Num="5" zHalfNm="248.978" Error="2.637">
-148.329 29.353 -14.869 4.907 -0.957
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.872" Depth="0.33"/>
<TopsideChapman PeakHeight="317.767" PeakDensity="193579.4" PeakScaleHeight="53.205" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
