<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 13:30:00.000"
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="14.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Unidentified traces above foF2</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" >
2026.10.27 (300) 13:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630010271330009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.974" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.519" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="417.429" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.338" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.336" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="266.475" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="174.440" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.262" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.576" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.630" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.282" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="167.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 352.500 355.000 355.000 355.000 355.000 356.563 358.125 359.688 361.250 362.813 364.375 365.938 367.500 369.063 370.625 372.188 373.750 375.313 376.875 378.438 380.000 385.000 390.000 390.000 390.000 395.000 399.427 404.521 410.448 417.429 425.773 435.921
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 57 60 63 63 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 66 63 69 63 66 63 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 1.953125 0.390625 -0.390625 -1.171875 -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 1.171875 -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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.766 113.533 115.0 115.299 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.475 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.246 2.889 3.229 3.338 3.215 3.215 3.317 3.338 3.498 3.669 3.829 3.975 4.11 4.236 4.354 4.468 4.577 4.684 4.788 4.89 4.992 5.094 5.195 5.297 5.4 5.505 5.611 5.72 5.831 5.947 6.066 6.19 6.318 6.452 6.588 6.72 6.833 6.896 6.9 6.898 6.887 6.868 6.841 6.806 6.764 6.716 6.662 6.603 6.538 6.469 6.395 6.318 6.238 6.154 6.067 5.979 5.888 5.796 5.702 5.606 5.51 5.414 5.316 5.219 5.121 5.023 4.926 4.829 4.732 4.636 4.541 4.446 4.353 4.26 4.168 4.078 3.988 3.9 3.813 3.728 3.644 3.561 3.479 3.399 3.32 3.243 3.167 3.093 3.02 2.948 2.878 2.809 2.742 2.676 2.611 2.548 2.486 2.426 2.366 2.308 2.252 2.196 2.142 2.089 2.038 1.987 1.938 1.89 1.843 1.797 1.752 1.708 1.666 1.624 1.583 1.543 1.505 1.467 1.43 1.394 1.359 1.324 1.291 1.258 1.227 1.195 1.165 1.136 1.107 1.079 1.052 1.025 0.999 0.973 0.949 0.925 0.901 0.878 0.856 0.834 0.813 0.792 0.772 0.752 0.733 0.714 0.696 0.678 0.661 0.644 0.628 0.612 0.596 0.581 0.566 0.552 0.538 0.524 0.511 0.498 0.485 0.472 0.46 0.449 0.437 0.426 0.415 0.404 0.394 0.384 0.374 0.365 0.355 0.346 0.337 0.329 0.32 0.312 0.304 0.296 0.289 0.281 0.274 0.267 0.26 0.254

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.338" PeakHeight="110.0" Num="3" Error="0.0">
-30.463 13.096 -3.141
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.338" EndFrequency="6.9" PeakHeight="266.475" Num="5" zHalfNm="174.44" Error="3.78">
-117.642 -49.438 16.602 0.713 -1.411
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.299" Depth="0.123"/>
<TopsideChapman PeakHeight="266.475" PeakDensity="590694.8" PeakScaleHeight="60.282" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
