<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 13:40:00.000"
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: 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" >
2026.01.31 (031) 13:40:00</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">
FF202603101311340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.401" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.965" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="3.286" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.312" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="383.346" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.005" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="183.944" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.540" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.205" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="227.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 305.000 311.000 317.000 323.000 329.000 335.000 340.000 340.000 342.500 345.000 350.000 350.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 370.000 371.250 372.500 373.750 375.000 375.000 380.000 385.000 385.000 390.000 392.500 395.000 395.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 445.000 445.000 450.000 455.000 460.000 465.000 465.000 480.000 485.000 485.000 490.000 500.000 505.000 510.000 520.000 525.000 535.000 545.000 550.000 560.000 570.000 575.000 585.000 590.000 600.000 606.277 613.349 621.377 630.567 641.194 653.621 668.349 686.083 707.846
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 45 0 0 48 45 48 0 48 51 51 51 51 0 51 0 0 54 51 0 48 0 54 54 0 54 57 51 0 51 54 54 48 57 54 45 54 51 54 54 48 51 51 54 51 54 54 54 57 57 57 45 48 57 57 57 57 57 57 60 60 60 57 60 57 54 54 54 54 51 54 54 54 51 51 54 51 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.953125 0.390625 0.390625 -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 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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.98 113.959 115.0 115.939 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.346 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.21 2.844 3.179 3.286 3.164 3.164 3.228 3.286 3.406 3.537 3.659 3.778 3.894 4.011 4.129 4.249 4.371 4.495 4.622 4.751 4.883 5.018 5.153 5.29 5.428 5.566 5.703 5.839 5.974 6.107 6.239 6.368 6.495 6.62 6.743 6.863 6.982 7.098 7.213 7.325 7.436 7.545 7.653 7.759 7.863 7.967 8.068 8.168 8.267 8.364 8.46 8.553 8.644 8.732 8.816 8.895 8.968 9.032 9.085 9.124 9.146 9.15 9.15 9.146 9.139 9.127 9.112 9.093 9.07 9.044 9.014 8.982 8.946 8.908 8.867 8.823 8.776 8.728 8.677 8.623 8.568 8.511 8.452 8.391 8.329 8.265 8.2 8.134 8.066 7.998 7.928 7.857 7.786 7.713 7.64 7.567 7.492 7.418 7.343 7.267 7.191 7.115 7.039 6.963 6.886 6.81 6.734 6.657 6.581 6.505 6.429 6.353 6.278 6.202 6.127 6.053 5.979 5.905 5.831 5.758 5.686 5.614 5.542 5.471 5.401 5.331 5.261 5.192 5.124 5.056 4.989 4.922 4.857 4.791 4.727 4.663 4.599 4.536 4.474 4.413 4.352 4.292 4.232 4.174 4.115 4.058 4.001 3.945 3.889 3.834 3.78 3.727 3.674 3.621 3.57 3.519 3.468 3.419 3.37 3.321 3.273 3.226 3.179 3.133 3.088 3.043 2.999 2.955 2.912 2.869 2.827 2.786 2.745 2.705 2.665 2.626 2.588 2.549 2.512 2.475 2.438 2.402 2.367 2.332 2.297 2.263

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.286" PeakHeight="110.0" Num="3" Error="0.0">
-30.424 13.038 -3.115
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.286" EndFrequency="9.15" PeakHeight="383.346" Num="5" zHalfNm="239.005" Error="6.452">
-237.816 -45.826 22.425 -9.975 3.785
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.939" Depth="0.122"/>
<TopsideChapman PeakHeight="383.346" PeakDensity="1038740.7" PeakScaleHeight="102.205" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
