<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 18:30:00.000"
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 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) 18:30:00</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">
FF202630410311830009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.731" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.041" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="2.774" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="332.175" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.751" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.279" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="124.258" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.664" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.365" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 397.500 400.000 397.500 395.000 395.000 400.000 401.250 402.500 403.750 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 450.000 460.000 465.000 465.000 470.000 475.329 481.472 488.630 497.076 507.194 519.535 534.921 554.638
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 0 0 0 0 72 0 0 0 63 69 0 0 72 0 0 0 66 69 57 0 0 0 66 69 0 69 57 66 0 66 69 63 66 63 60 63 57 66 63 63 63 57 60 60 60 60 60 54 60 57 63 63 60 54 60 63 60 57 60 57 57 57 54 51
</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 -1.171875 -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" >
89.586 90.0 95.0 100.0 105.0 110.0 114.254 115.0 118.507 120.0 122.761 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.175 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.864 2.401 2.684 2.774 2.652 2.652 2.652 2.695 2.774 2.858 3.052 3.258 3.476 3.708 3.953 4.211 4.478 4.752 5.03 5.308 5.584 5.857 6.125 6.389 6.647 6.901 7.15 7.395 7.635 7.873 8.107 8.338 8.567 8.794 9.019 9.243 9.465 9.686 9.906 10.126 10.344 10.561 10.776 10.989 11.199 11.401 11.594 11.771 11.922 12.035 12.094 12.1 12.098 12.083 12.056 12.017 11.967 11.905 11.834 11.753 11.664 11.566 11.461 11.349 11.231 11.107 10.977 10.843 10.705 10.564 10.419 10.271 10.12 9.968 9.814 9.658 9.502 9.345 9.187 9.029 8.871 8.713 8.556 8.399 8.243 8.088 7.934 7.781 7.63 7.48 7.332 7.185 7.04 6.897 6.756 6.616 6.479 6.343 6.21 6.078 5.949 5.822 5.697 5.574 5.453 5.334 5.218 5.103 4.991 4.881 4.772 4.666 4.562 4.46 4.36 4.262 4.166 4.072 3.98 3.89 3.801 3.715 3.63 3.547 3.466 3.387 3.309 3.233 3.159 3.086 3.015 2.945 2.877 2.81 2.745 2.682 2.619 2.559 2.499 2.441 2.384 2.329 2.274 2.221 2.17 2.119 2.069 2.021 1.974 1.928 1.882 1.838 1.795 1.753 1.712 1.672 1.633 1.594 1.557 1.52 1.485 1.45 1.416 1.383 1.35 1.318 1.287 1.257 1.227 1.199 1.17 1.143 1.116 1.09 1.064 1.039 1.014 0.99 0.967 0.944 0.922 0.9 0.879 0.858 0.838 0.818

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.774" PeakHeight="110.0" Num="3" Error="0.0">
-29.993 12.409 -2.83
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.774" EndFrequency="12.1" PeakHeight="332.175" Num="5" zHalfNm="239.751" Error="2.818">
-188.295 -36.391 23.421 -10.081 1.932
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.761" Depth="0.122"/>
<TopsideChapman PeakHeight="332.175" PeakDensity="1816501.2" PeakScaleHeight="65.365" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
