<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 16:20:00.000"
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 1 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.10.31 (304) 16:20:00</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">
FF202630410311620009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.525" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="9.873" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.742" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.533" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.280" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.309" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="313.267" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="255.538" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="204.725" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.494" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="101.735" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="96.971" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.104" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.653" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.260" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="33">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 407.500 410.000 415.000 415.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 485.000 494.388 505.644 519.388 536.546 558.573 587.881
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 63 63 60 63 54 57 57 57 57 57 54 54 57 54 48 45 0 0 0 54 0 54 48 51 0 48 51 51 45 45 39
</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 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 385.000 385.000 386.000 387.000 388.000 389.000 390.000 390.000 390.000 390.000 395.000 395.000 397.500 400.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 57 0 0 0 0 0 0 63 66 0 63 51 60
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.5 90.0 95.0 100.0 105.0 110.0 112.005 114.009 115.0 116.014 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.538 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 313.267 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.206 2.839 3.173 3.28 3.158 3.158 3.218 3.28 3.51 3.764 4.015 4.277 4.558 4.858 5.177 5.504 5.829 6.144 6.444 6.727 6.995 7.249 7.491 7.722 7.945 8.161 8.371 8.576 8.777 8.973 9.166 9.353 9.531 9.692 9.817 9.872 9.873 10.175 10.375 10.561 10.739 10.904 11.051 11.178 11.288 11.384 11.462 11.514 11.525 11.524 11.516 11.499 11.473 11.438 11.395 11.345 11.287 11.223 11.152 11.075 10.993 10.906 10.813 10.716 10.615 10.511 10.402 10.291 10.177 10.06 9.94 9.819 9.696 9.571 9.445 9.318 9.19 9.061 8.932 8.802 8.672 8.542 8.412 8.282 8.153 8.024 7.895 7.768 7.64 7.514 7.389 7.264 7.141 7.018 6.897 6.777 6.659 6.541 6.425 6.31 6.197 6.085 5.975 5.866 5.758 5.652 5.547 5.444 5.343 5.243 5.144 5.047 4.951 4.857 4.765 4.674 4.584 4.496 4.41 4.324 4.241 4.158 4.078 3.998 3.92 3.843 3.768 3.694 3.621 3.55 3.48 3.411 3.344 3.278 3.213 3.149 3.086 3.025 2.965 2.905 2.847 2.79 2.735 2.68 2.626 2.574 2.522 2.471 2.422 2.373 2.325 2.278 2.232 2.187 2.143 2.1 2.058 2.016 1.975 1.935 1.896 1.858 1.82 1.783 1.747 1.712 1.677 1.643 1.61 1.577 1.545 1.514 1.483 1.453 1.423 1.394 1.366 1.338 1.311 1.284 1.258 1.232 1.207 1.183 1.159 1.135 1.112

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.28" PeakHeight="110.0" Num="3" Error="0.0">
-30.42 13.032 -3.112
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.28" EndFrequency="9.873" PeakHeight="255.538" Num="5" Error="0.0">
-125.412 -24.086 15.522 -8.337 2.789
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="9.873" EndFrequency="11.525" PeakHeight="313.267" Num="5" zHalfNm="204.725" Error="3.356">
-54.05 -7.394 3.859 -1.037 0.893
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.014" Depth="0.122"/>
<TopsideChapman PeakHeight="313.267" PeakDensity="1647960.6" PeakScaleHeight="75.653" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
