<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 08:30:00.000"
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 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: F2o cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, 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" >
2026.10.28 (301) 08:30:00</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">
FF202630110280830009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.970" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.699" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="371.386" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="371.386" 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="4.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="371.386" 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="0.976" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.443" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.949" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.819" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.362" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.026" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.717" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
371.386 380.000 395.000 410.000 430.000 465.000 525.000 655.000 1130.911
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 1.171875 -0.390625 1.953125 1.953125 -0.390625 -2.734375 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.297 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.512 130.0 135.0 140.0 145.0 145.024 150.0 155.0 160.0 162.536 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.443 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.65 0.846 0.945 0.976 0.96 0.909 0.818 0.754 0.754 0.754 0.754 0.754 0.754 0.817 0.88 0.944 0.976 1.002 1.066 1.152 1.257 1.373 1.487 1.596 1.701 1.803 1.904 2.005 2.108 2.214 2.324 2.44 2.564 2.699 2.848 3.014 3.203 3.413 3.638 3.853 4.041 4.195 4.322 4.426 4.513 4.586 4.649 4.703 4.749 4.789 4.823 4.852 4.877 4.898 4.915 4.929 4.939 4.946 4.949 4.95 4.95 4.947 4.942 4.933 4.922 4.909 4.892 4.873 4.852 4.829 4.804 4.777 4.747 4.717 4.684 4.65 4.614 4.578 4.539 4.5 4.46 4.418 4.376 4.333 4.289 4.244 4.199 4.153 4.107 4.06 4.013 3.966 3.918 3.871 3.823 3.775 3.726 3.678 3.63 3.582 3.534 3.486 3.438 3.391 3.343 3.296 3.249 3.203 3.156 3.11 3.065 3.019 2.974 2.93 2.886 2.842 2.798 2.756 2.713 2.671 2.629 2.588 2.548 2.507 2.468 2.428 2.39 2.351 2.313 2.276 2.239 2.203 2.167 2.131 2.096 2.062 2.028 1.995 1.962 1.929 1.897 1.865 1.834 1.803 1.773 1.743 1.714 1.685 1.657 1.629 1.601 1.574 1.547 1.521 1.495 1.469 1.444 1.42 1.395 1.371 1.348 1.325 1.302 1.28 1.258 1.236 1.215 1.194 1.173 1.153 1.133 1.113 1.094 1.075 1.056 1.038 1.02 1.002 0.985 0.968 0.951 0.934 0.918 0.902 0.886 0.871

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.976" PeakHeight="110.0" Num="3" Error="0.0">
-26.397 7.885 -1.191
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.976" EndFrequency="4.95" PeakHeight="373.443" Num="5" zHalfNm="266.949" Error="15.747">
-240.107 52.565 -37.091 21.663 -7.937
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="52.536" Depth="0.222"/>
<TopsideChapman PeakHeight="373.443" PeakDensity="304001.25" PeakScaleHeight="87.717" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
