<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 20:20:00.000"
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 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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) 20:20:00</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">
FF202630410312020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.645" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.736" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.631" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="369.665" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="288.277" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.418" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.385" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.742" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.531" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="130.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="73">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 445.000 445.000 440.000 445.000 450.000 450.000 450.000 452.143 454.286 456.429 458.571 460.714 462.857 465.000 465.000 465.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 480.000 485.000 487.500 490.000 490.000 495.000 495.000 500.000 500.000 500.000 505.000 505.000 507.665 510.736 514.315 518.538 523.597 529.768 537.461 547.319
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 63 69 57 63 69 60 69 69 63 72 66 69 72 63 66 66 66 51 63 63 72 66 0 0 0 63 60 66 66 0 60 63 63 0 0 0 0 0 0 60 0 63 60 63 66 66 63 66 66 60 66 63 57 60 0 57 57 57 57 57 57 57 51 57 60 60 60 57 0 0 54 48
</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 -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" >
89.882 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.39 125.0 130.0 130.781 135.0 140.0 141.171 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 369.665 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21 1.091 1.413 1.579 1.631 1.599 1.5 1.489 1.489 1.489 1.489 1.547 1.615 1.631 1.755 1.91 2.065 2.226 2.397 2.58 2.778 2.993 3.225 3.473 3.735 4.008 4.287 4.571 4.854 5.135 5.413 5.686 5.956 6.221 6.482 6.739 6.993 7.244 7.492 7.738 7.983 8.226 8.468 8.71 8.951 9.193 9.435 9.677 9.921 10.165 10.411 10.657 10.903 11.149 11.391 11.625 11.843 12.028 12.157 12.2 12.2 12.19 12.163 12.12 12.062 11.991 11.906 11.809 11.702 11.584 11.457 11.322 11.18 11.031 10.875 10.715 10.55 10.382 10.21 10.035 9.858 9.68 9.5 9.32 9.139 8.958 8.777 8.597 8.417 8.239 8.062 7.887 7.713 7.541 7.371 7.204 7.038 6.875 6.715 6.557 6.401 6.249 6.098 5.951 5.806 5.664 5.525 5.389 5.255 5.124 4.996 4.871 4.748 4.628 4.511 4.396 4.284 4.175 4.068 3.963 3.861 3.761 3.664 3.569 3.476 3.386 3.298 3.212 3.128 3.046 2.966 2.889 2.813 2.739 2.667 2.597 2.528 2.461 2.396 2.333 2.271 2.211 2.153 2.096 2.04 1.986 1.933 1.882 1.832 1.783 1.736 1.69 1.645 1.601 1.558 1.517 1.476 1.437 1.399 1.361 1.325 1.29 1.255 1.222 1.189 1.157 1.127 1.096 1.067 1.039 1.011 0.984 0.958 0.932 0.907 0.883 0.859 0.836 0.814 0.792 0.771 0.75 0.73 0.711 0.692 0.673 0.655

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.631" PeakHeight="110.0" Num="3" Error="0.0">
-28.413 10.254 -1.959
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.631" EndFrequency="12.2" PeakHeight="369.665" Num="5" zHalfNm="288.277" Error="4.191">
-203.428 -43.878 29.652 -15.382 4.542
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.171" Depth="0.142"/>
<TopsideChapman PeakHeight="369.665" PeakDensity="1846650.1" PeakScaleHeight="57.531" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
