<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 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="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) 13:40:00</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">
FF202629110181340009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.576" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.302" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" 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="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="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.500" 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="3.359" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.346" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="355.874" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.030" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.317" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.626" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.220" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.331" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="186.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 342.553 345.105 347.658 350.211 352.763 355.316 357.868 360.421 362.974 365.526 368.079 370.632 373.184 375.737 378.290 380.842 383.395 385.947 388.500 391.053 393.605 396.158 398.711 401.263 403.816 406.368 408.921 411.474 414.026 416.579 419.132 421.684 424.237 426.790 429.342 431.895 434.447 437.000 439.553 442.105 444.658 447.211 449.763 452.316 454.869 457.421 459.974 462.526 465.079 467.632 470.184 472.737 475.290 477.842 480.395 482.947 485.500 490.000 495.000 505.000 510.000 520.000 530.000 540.000 550.000 565.000 580.000 595.000 615.000 639.891
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 63 63 63 63 60 60 60 60 60 57 60 60 60 60 60 60 60 60 63 60 57 54 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 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 -2.734375 0.390625 -2.734375 -0.390625 -2.734375 0.390625 -1.953125 -1.953125 -1.953125 2.734375 1.171875 1.953125 2.734375 0.390625 2.734375 -2.734375 -0.390625 2.734375 -1.171875 2.734375 -1.953125 2.734375 -1.171875 1.953125 -0.390625 2.734375 -1.171875 1.171875 -0.390625 -1.171875 -2.734375 1.953125 1.171875 -2.734375 -1.171875 -1.953125 2.734375 -2.734375 2.734375 -0.390625 -0.390625 1.953125 1.953125 -2.734375 -1.953125 1.171875 0.390625 1.171875 -1.171875 -0.390625 -1.953125 0.390625 1.171875 -0.390625 1.171875 1.171875 -1.953125 -2.734375 0.390625 2.734375 -1.171875 1.171875 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" >
89.488 90.0 95.0 100.0 105.0 110.0 111.677 113.355 115.0 115.032 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.874 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.26 2.907 3.25 3.359 3.236 3.236 3.357 3.359 3.55 3.726 3.892 4.054 4.212 4.368 4.524 4.678 4.833 4.988 5.144 5.301 5.458 5.616 5.776 5.936 6.098 6.261 6.424 6.589 6.755 6.921 7.089 7.257 7.427 7.596 7.766 7.937 8.108 8.279 8.449 8.62 8.789 8.957 9.124 9.288 9.45 9.608 9.761 9.907 10.046 10.175 10.291 10.393 10.477 10.541 10.583 10.6 10.6 10.597 10.588 10.571 10.548 10.519 10.483 10.442 10.395 10.342 10.285 10.224 10.158 10.087 10.013 9.935 9.854 9.77 9.683 9.593 9.501 9.406 9.31 9.211 9.111 9.01 8.907 8.802 8.697 8.591 8.484 8.377 8.269 8.161 8.053 7.944 7.835 7.727 7.618 7.51 7.402 7.295 7.188 7.082 6.976 6.871 6.766 6.662 6.56 6.457 6.356 6.256 6.156 6.058 5.961 5.864 5.769 5.675 5.581 5.489 5.398 5.308 5.219 5.132 5.045 4.96 4.876 4.792 4.711 4.63 4.55 4.472 4.394 4.318 4.243 4.169 4.096 4.024 3.953 3.884 3.815 3.748 3.682 3.616 3.552 3.489 3.427 3.365 3.305 3.246 3.188 3.131 3.074 3.019 2.965 2.911 2.859 2.807 2.756 2.706 2.657 2.609 2.562 2.515 2.469 2.424 2.38 2.337 2.294 2.252 2.211 2.171 2.131 2.092 2.054 2.016 1.979 1.943 1.907 1.872 1.838 1.804 1.771 1.738 1.706 1.675 1.644 1.614 1.584 1.555

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.359" PeakHeight="110.0" Num="3" Error="0.0">
-30.478 13.118 -3.152
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.359" EndFrequency="10.6" PeakHeight="355.874" Num="5" zHalfNm="242.03" Error="3.476">
-212.779 -41.398 14.046 -1.375 0.664
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.032" Depth="0.123"/>
<TopsideChapman PeakHeight="355.874" PeakDensity="1394044.6" PeakScaleHeight="83.331" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
