<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 13:50:00.000"
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="15.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.18 (291) 13:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629110181350009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.523" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.490" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="506.998" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.371" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.352" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="357.500" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.778" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.376" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.700" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="152.361" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.029" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.620" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.750" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 333.161 336.321 339.482 342.643 345.803 348.964 352.125 355.285 358.446 361.607 364.767 367.928 371.089 374.249 377.410 380.571 383.731 386.892 390.053 393.213 396.374 399.535 402.695 405.856 409.017 412.178 415.338 418.499 421.660 424.820 427.981 431.142 434.302 437.463 440.624 443.784 446.945 450.106 453.266 456.427 459.588 462.748 465.909 469.070 472.230 475.391 478.552 481.712 484.873 488.034 491.194 494.355 497.516 500.676 503.837 506.998 510.158 513.319 520.000 530.000 540.000 550.000 560.000 570.000 585.000 600.000 615.000 634.136
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 63 66 66 66 69 69 69 69 69 69 69 69 69 69 69 69 69 72 72 72 72 69 69 66 75 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 1.171875 -1.171875 -2.734375 1.171875 -2.734375 -1.171875 2.734375 -1.171875 0.390625 -2.734375 -1.171875 -1.953125 0.390625 1.171875 -0.390625 2.734375 0.390625 1.171875 -0.390625 -0.390625 2.734375 -0.390625 1.171875 0.390625 1.171875 2.734375 -0.390625 1.171875 -1.171875 1.171875 1.953125 -2.734375 -1.953125 -1.953125 -1.953125 2.734375 2.734375 1.171875 -1.171875 2.734375 -1.953125 1.171875 -0.390625 -2.734375 1.953125 0.390625 2.734375 0.390625 -2.734375 -1.953125 2.734375 1.953125 0.390625 1.171875 -2.734375 -1.953125 0.390625 -2.734375 0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 57 54 0 54 0 0 0 48 0 0 0 51 0 0 51 48 0 0 48 45 51 48
</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
</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" >
89.486 90.0 95.0 100.0 105.0 110.0 111.628 113.255 114.883 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.5 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.268 2.917 3.261 3.371 3.248 3.248 3.371 3.376 3.57 3.737 3.893 4.043 4.192 4.339 4.488 4.637 4.789 4.943 5.1 5.259 5.42 5.583 5.749 5.915 6.084 6.253 6.422 6.592 6.761 6.93 7.098 7.266 7.432 7.597 7.761 7.924 8.085 8.245 8.403 8.56 8.715 8.869 9.021 9.171 9.319 9.465 9.607 9.746 9.88 10.008 10.129 10.238 10.334 10.412 10.467 10.496 10.5 10.499 10.492 10.478 10.458 10.432 10.399 10.361 10.318 10.269 10.216 10.157 10.095 10.029 9.958 9.884 9.807 9.726 9.643 9.557 9.468 9.378 9.285 9.19 9.093 8.995 8.895 8.795 8.693 8.59 8.486 8.382 8.277 8.172 8.066 7.961 7.855 7.749 7.643 7.537 7.432 7.326 7.222 7.117 7.014 6.91 6.808 6.706 6.605 6.504 6.404 6.306 6.208 6.111 6.015 5.919 5.825 5.732 5.64 5.549 5.458 5.369 5.281 5.194 5.109 5.024 4.94 4.858 4.776 4.696 4.617 4.538 4.461 4.385 4.311 4.237 4.164 4.093 4.022 3.952 3.884 3.817 3.75 3.685 3.621 3.557 3.495 3.434 3.373 3.314 3.256 3.198 3.142 3.086 3.032 2.978 2.925 2.873 2.822 2.772 2.722 2.674 2.626 2.579 2.533 2.487 2.443 2.399 2.356 2.314 2.272 2.231 2.191 2.152 2.113 2.075 2.037 2.001 1.964 1.929 1.894 1.86 1.826 1.793 1.761 1.729 1.698 1.667 1.637 1.607

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.371" PeakHeight="110.0" Num="3" Error="0.0">
-30.487 13.131 -3.158
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.371" EndFrequency="10.5" PeakHeight="357.5" Num="5" zHalfNm="239.778" Error="5.024">
-212.866 -44.718 17.986 -5.494 2.475
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.883" Depth="0.123"/>
<TopsideChapman PeakHeight="357.5" PeakDensity="1367866.0" PeakScaleHeight="84.62" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
