<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 16:30:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2x cusp not found, 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) 16:30:00</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">
FF202630410311630009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.752" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.194" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.258" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.299" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.564" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.898" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.575" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.032" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.037" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.197" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.55 11.6 11.65 11.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 366.250 367.500 368.750 370.000 371.250 372.500 373.750 375.000 375.000 376.429 377.857 379.286 380.714 382.143 383.571 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 410.000 415.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 450.000 450.000 455.000 465.000 470.000 475.000 485.000 495.471 507.987 523.209 542.124 566.259 598.122
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 54 57 0 63 66 60 51 54 60 57 60 57 57 54 48 57 54 54 57 48 51 48 57 54 54 54 51 51 48 51 48 48 48 51 51 48 51 51 48 45 45
</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 -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
</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" >
89.503 90.0 95.0 100.0 105.0 110.0 112.1 114.199 115.0 116.299 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.564 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.191 2.82 3.152 3.258 3.136 3.136 3.183 3.258 3.399 3.601 3.816 4.043 4.28 4.526 4.777 5.032 5.288 5.545 5.799 6.052 6.302 6.548 6.792 7.032 7.269 7.503 7.734 7.963 8.188 8.411 8.632 8.85 9.066 9.28 9.491 9.699 9.904 10.106 10.303 10.496 10.683 10.863 11.033 11.191 11.335 11.46 11.563 11.64 11.686 11.7 11.7 11.694 11.678 11.653 11.618 11.575 11.524 11.466 11.4 11.327 11.248 11.164 11.073 10.978 10.877 10.773 10.664 10.552 10.436 10.318 10.196 10.072 9.947 9.819 9.69 9.559 9.427 9.294 9.161 9.027 8.892 8.758 8.623 8.489 8.354 8.22 8.087 7.954 7.822 7.691 7.561 7.432 7.303 7.176 7.05 6.926 6.802 6.68 6.56 6.441 6.323 6.207 6.092 5.979 5.867 5.757 5.648 5.541 5.436 5.332 5.23 5.129 5.031 4.933 4.837 4.743 4.65 4.559 4.47 4.382 4.295 4.21 4.127 4.045 3.964 3.885 3.808 3.731 3.657 3.583 3.511 3.44 3.371 3.303 3.236 3.17 3.106 3.043 2.981 2.921 2.861 2.803 2.746 2.69 2.635 2.581 2.528 2.476 2.425 2.376 2.327 2.279 2.232 2.186 2.141 2.097 2.054 2.012 1.97 1.93 1.89 1.851 1.813 1.775 1.738 1.702 1.667 1.633 1.599 1.566 1.533 1.502 1.471 1.44 1.41 1.381 1.352 1.324 1.297 1.27 1.244 1.218 1.193 1.168 1.144 1.12

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.258" PeakHeight="110.0" Num="3" Error="0.0">
-30.403 13.007 -3.101
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.258" EndFrequency="11.7" PeakHeight="324.564" Num="5" zHalfNm="221.898" Error="2.136">
-194.054 -24.082 14.68 -5.472 0.663
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.299" Depth="0.122"/>
<TopsideChapman PeakHeight="324.564" PeakDensity="1698387.1" PeakScaleHeight="74.197" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
