<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 11:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.01.31 (031) 11:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603101311100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.940" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.992" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.630" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="323.256" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="209.593" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.697" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="162.341" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.380" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.392" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 246.667 248.333 250.000 250.000 253.333 256.667 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 266.667 268.333 270.000 270.000 270.000 271.250 272.500 273.750 275.000 277.500 280.000 280.000 280.000 280.000 285.000 285.000 285.000 287.500 290.000 290.000 295.000 295.000 297.500 300.000 301.667 303.333 305.000 305.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 345.000 345.000 350.000 355.000 355.000 360.000 370.000 375.000 380.000 385.000 395.000 400.000 410.000 420.000 435.000 445.000 456.792 470.900 488.081 509.460 536.792 572.965 623.095 697.191
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 54 60 0 0 0 54 54 0 0 0 0 0 0 51 54 0 0 60 0 60 57 60 0 0 0 0 63 0 0 0 63 0 0 66 0 66 63 63 63 57 60 63 54 60 48 57 0 0 57 63 54 63 54 60 66 60 66 60 63 63 63 66 63 60 63 66 66 66 63 66 66 63 63 66 66 66 66 69 69 66 69 66 51 60 51 51 54
</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 -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 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.613 90.0 95.0 100.0 105.0 110.0 114.944 115.0 119.887 120.0 124.831 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 323.256 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.766 2.277 2.545 2.63 2.507 2.507 2.507 2.51 2.63 2.636 2.802 2.968 3.134 3.301 3.47 3.644 3.822 4.007 4.198 4.397 4.605 4.822 5.049 5.286 5.53 5.78 6.031 6.279 6.518 6.746 6.958 7.153 7.33 7.491 7.636 7.765 7.881 7.985 8.076 8.157 8.228 8.29 8.343 8.387 8.424 8.454 8.476 8.491 8.499 8.5 8.5 8.495 8.486 8.472 8.453 8.43 8.403 8.372 8.337 8.298 8.256 8.211 8.162 8.111 8.057 8.0 7.94 7.879 7.815 7.75 7.682 7.613 7.542 7.47 7.397 7.322 7.246 7.169 7.092 7.014 6.935 6.855 6.775 6.695 6.614 6.533 6.452 6.371 6.29 6.209 6.128 6.047 5.966 5.886 5.805 5.726 5.646 5.567 5.489 5.411 5.333 5.257 5.18 5.105 5.029 4.955 4.881 4.808 4.736 4.664 4.593 4.523 4.454 4.385 4.317 4.25 4.184 4.118 4.053 3.989 3.926 3.864 3.802 3.742 3.682 3.622 3.564 3.506 3.45 3.394 3.338 3.284 3.23 3.177 3.125 3.074 3.023 2.973 2.924 2.876 2.828 2.781 2.735 2.689 2.644 2.6 2.557 2.514 2.472 2.43 2.389 2.349 2.31 2.271 2.232 2.195 2.158 2.121 2.085 2.05 2.015 1.981 1.947 1.914 1.882 1.85 1.818 1.787 1.757 1.727 1.697 1.668 1.64 1.612 1.584 1.557 1.53 1.504 1.478 1.453 1.428 1.404 1.38 1.356 1.333 1.31

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.63" PeakHeight="110.0" Num="3" Error="0.0">
-29.851 12.205 -2.741
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.63" EndFrequency="8.5" PeakHeight="323.256" Num="5" zHalfNm="209.593" Error="1.984">
-215.276 28.747 -17.542 6.46 -0.814
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.831" Depth="0.123"/>
<TopsideChapman PeakHeight="323.256" PeakDensity="896402.0" PeakScaleHeight="89.392" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
