<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 13:40:00.000"
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="18.0">
<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" >
2026.02.02 (033) 13:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603302021340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.285" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.395" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.289" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.313" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="402.183" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="189.618" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.600" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="104.445" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="237.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 319.167 323.333 327.500 331.667 335.833 340.000 345.000 345.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 371.667 373.333 375.000 380.000 380.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 515.000 520.000 525.000 530.000 540.000 545.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 575.000 585.000 585.000 595.000 600.000 605.000 610.895 617.407 624.639 632.716 641.797 652.081 663.824 677.359 693.132 711.746 734.047
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 0 0 0 0 0 51 51 48 0 51 45 51 48 51 45 51 0 0 48 54 48 54 54 48 57 51 57 54 60 57 63 60 63 63 60 48 60 54 60 57 54 57 57 60 60 60 48 51 60 60 60 60 60 57 57 57 57 57 57 60 57 57 57 60 57 57 57 57 57 57 57 57 54 51 54 54 54 54 54 54 51 48 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 0.390625 -1.171875 1.953125 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375
</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" >
89.5 90.0 95.0 100.0 105.0 110.0 111.971 113.941 115.0 115.912 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 402.183 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.212 2.846 3.182 3.289 3.167 3.167 3.233 3.289 3.415 3.551 3.679 3.803 3.925 4.047 4.169 4.293 4.42 4.548 4.678 4.811 4.946 5.083 5.221 5.36 5.499 5.639 5.778 5.917 6.054 6.19 6.324 6.457 6.588 6.716 6.843 6.968 7.091 7.212 7.332 7.45 7.566 7.681 7.794 7.907 8.017 8.127 8.236 8.343 8.45 8.555 8.66 8.764 8.866 8.968 9.068 9.166 9.263 9.356 9.447 9.532 9.611 9.68 9.737 9.777 9.798 9.8 9.799 9.795 9.786 9.773 9.756 9.736 9.712 9.684 9.653 9.619 9.582 9.541 9.498 9.452 9.404 9.353 9.3 9.244 9.187 9.127 9.066 9.003 8.938 8.871 8.803 8.734 8.664 8.592 8.519 8.446 8.371 8.296 8.219 8.143 8.065 7.987 7.909 7.83 7.751 7.671 7.591 7.511 7.431 7.351 7.271 7.191 7.111 7.031 6.951 6.872 6.792 6.713 6.635 6.556 6.478 6.4 6.323 6.246 6.169 6.093 6.018 5.943 5.868 5.794 5.721 5.648 5.575 5.504 5.432 5.362 5.292 5.223 5.154 5.086 5.019 4.952 4.886 4.821 4.756 4.692 4.629 4.566 4.504 4.443 4.382 4.322 4.263 4.204 4.146 4.089 4.032 3.976 3.921 3.866 3.812 3.759 3.706 3.654 3.603 3.552 3.502 3.452 3.403 3.355 3.308 3.261 3.214 3.168 3.123 3.079 3.035 2.991 2.948 2.906 2.864 2.823 2.782 2.742 2.703 2.664

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.289" PeakHeight="110.0" Num="3" Error="0.0">
-30.426 13.042 -3.116
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.289" EndFrequency="9.8" PeakHeight="402.183" Num="5" zHalfNm="253.454" Error="4.894">
-252.662 -54.19 28.325 -11.811 4.067
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.912" Depth="0.122"/>
<TopsideChapman PeakHeight="402.183" PeakDensity="1191563.2" PeakScaleHeight="104.445" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
