<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 12:40:00.000"
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" >
2026.02.04 (035) 12:40:00</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">
FF202603502041240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.623" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.300" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.132" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.238" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="329.764" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="211.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.067" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.457" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.092" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.358" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="187.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 395.000 395.000 395.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 455.000 460.000 460.000 470.000 475.000 485.000 491.245 498.081 505.596 513.898 523.115 533.409 544.980 558.081 573.037 590.272
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 54 48 45 54 48 45 51 51 54 54 54 54 51 51 51 51 51 54 57 54 57 54 54 54 51 48 51 51 51 48 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 -0.390625 -0.390625 -0.390625 -0.390625 1.953125
</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" >
89.524 90.0 95.0 100.0 105.0 110.0 112.638 115.0 115.275 117.913 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 329.764 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.106 2.711 3.03 3.132 3.01 3.01 3.01 3.132 3.193 3.34 3.489 3.641 3.796 3.954 4.114 4.277 4.44 4.603 4.764 4.924 5.082 5.238 5.39 5.539 5.686 5.829 5.97 6.108 6.244 6.377 6.508 6.637 6.764 6.889 7.013 7.135 7.255 7.374 7.491 7.607 7.72 7.831 7.94 8.045 8.145 8.239 8.324 8.396 8.453 8.488 8.5 8.5 8.497 8.488 8.473 8.454 8.429 8.399 8.365 8.326 8.284 8.237 8.187 8.133 8.076 8.016 7.953 7.888 7.82 7.749 7.677 7.602 7.526 7.449 7.369 7.289 7.207 7.124 7.041 6.956 6.871 6.785 6.699 6.613 6.526 6.439 6.352 6.265 6.178 6.091 6.004 5.918 5.832 5.746 5.661 5.576 5.492 5.408 5.325 5.243 5.161 5.08 5.0 4.921 4.842 4.764 4.687 4.61 4.535 4.461 4.387 4.314 4.242 4.171 4.101 4.032 3.964 3.896 3.83 3.764 3.7 3.636 3.573 3.511 3.45 3.39 3.331 3.273 3.216 3.159 3.104 3.049 2.995 2.942 2.89 2.838 2.788 2.738 2.689 2.641 2.594 2.547 2.502 2.457 2.413 2.369 2.326 2.284 2.243 2.202 2.163 2.123 2.085 2.047 2.01 1.973 1.937 1.902 1.867 1.833 1.8 1.767 1.735 1.703 1.672 1.641 1.611 1.582 1.553 1.524 1.496 1.469 1.442 1.415 1.389 1.364 1.338 1.314 1.29 1.266 1.243 1.22 1.197 1.175 1.153 1.132

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.132" PeakHeight="110.0" Num="3" Error="0.0">
-30.303 12.861 -3.034
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.132" EndFrequency="8.5" PeakHeight="329.764" Num="5" zHalfNm="211.454" Error="2.65">
-190.589 -34.568 19.067 -7.127 1.366
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.913" Depth="0.122"/>
<TopsideChapman PeakHeight="329.764" PeakDensity="896402.0" PeakScaleHeight="83.358" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
