<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 17:40:00.000"
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="12.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2o cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.20 (293) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310201740009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.382" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.554" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="3.043" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.195" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="390.762" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.320" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.045" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="198.776" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.237" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.566" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="224.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="40">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.052 540.642 546.861 553.822 561.665 570.569 580.766 592.558 606.354 622.709 642.409 666.598 697.008 736.390 789.405
</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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</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 1.171875 -2.734375 1.953125 -2.734375 0.390625 -0.390625 -1.953125 2.734375 -0.390625 1.953125 1.171875
</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" >
89.538 90.0 95.0 100.0 105.0 110.0 113.024 115.0 116.048 119.072 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.762 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.046 2.634 2.944 3.043 2.921 2.921 2.921 3.043 3.065 3.188 3.312 3.44 3.57 3.703 3.838 3.975 4.114 4.255 4.397 4.54 4.683 4.827 4.971 5.114 5.257 5.399 5.541 5.681 5.82 5.958 6.095 6.23 6.364 6.497 6.627 6.757 6.884 7.01 7.134 7.256 7.376 7.495 7.611 7.724 7.836 7.944 8.05 8.153 8.252 8.347 8.439 8.526 8.608 8.685 8.756 8.82 8.878 8.928 8.97 9.003 9.028 9.044 9.05 9.05 9.049 9.044 9.035 9.024 9.009 8.991 8.969 8.945 8.918 8.889 8.856 8.821 8.784 8.745 8.703 8.659 8.613 8.565 8.516 8.464 8.411 8.357 8.301 8.243 8.185 8.125 8.064 8.002 7.939 7.875 7.81 7.745 7.678 7.611 7.544 7.476 7.407 7.339 7.269 7.2 7.13 7.06 6.99 6.919 6.849 6.778 6.708 6.637 6.567 6.496 6.426 6.356 6.286 6.217 6.147 6.078 6.009 5.94 5.872 5.804 5.737 5.669 5.603 5.536 5.47 5.405 5.34 5.275 5.211 5.147 5.084 5.022 4.959 4.898 4.837 4.776 4.716 4.657 4.598 4.539 4.482 4.424 4.368 4.311 4.256 4.201 4.146 4.093 4.039 3.986 3.934 3.883 3.832 3.781 3.731 3.682 3.633 3.585 3.537 3.49 3.443 3.397 3.352 3.307 3.262 3.218 3.175 3.132 3.09 3.048 3.007 2.966 2.925 2.886 2.846 2.808 2.769 2.731 2.694 2.657 2.621 2.585

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.043" PeakHeight="110.0" Num="3" Error="0.0">
-30.231 12.755 -2.986
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.043" EndFrequency="9.05" PeakHeight="390.762" Num="5" zHalfNm="241.32" Error="1.433">
-260.719 -18.019 10.189 -3.806 0.665
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.072" Depth="0.122"/>
<TopsideChapman PeakHeight="390.762" PeakDensity="1016160.06" PeakScaleHeight="109.566" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
