<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 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" >
2026.02.04 (035) 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">
FF202603502041340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.424" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.873" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.291" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.314" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.440" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.494" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="184.120" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.267" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="104.600" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="234.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="50">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 366.000 372.000 378.000 384.000 390.000 395.000 397.500 400.000 405.000 405.000 410.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 470.000 475.000 485.000 490.000 495.000 500.000 505.000 515.000 520.000 525.000 530.000 540.000 550.000 559.119 569.099 580.070 592.185 605.634 620.650 637.523 656.622 678.418 703.524
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 48 0 0 48 48 0 51 51 45 51 51 51 48 54 54 48 54 54 48 57 57 57 57 57 57 57 57 57 57 57 57 57 60 57 60 57 60 57 57 57 54 45 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 2.734375 -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 -1.171875 1.171875 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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.961 113.922 115.0 115.883 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.44 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.214 2.848 3.184 3.291 3.169 3.169 3.236 3.291 3.399 3.523 3.643 3.761 3.878 3.994 4.11 4.226 4.343 4.459 4.576 4.693 4.81 4.926 5.042 5.158 5.272 5.386 5.499 5.611 5.722 5.831 5.939 6.047 6.152 6.257 6.361 6.463 6.564 6.664 6.762 6.86 6.956 7.051 7.145 7.238 7.329 7.418 7.506 7.592 7.675 7.756 7.833 7.906 7.975 8.036 8.091 8.136 8.17 8.192 8.2 8.2 8.198 8.193 8.185 8.173 8.158 8.14 8.119 8.095 8.068 8.038 8.006 7.972 7.935 7.896 7.855 7.812 7.767 7.72 7.671 7.621 7.569 7.516 7.461 7.405 7.348 7.29 7.231 7.171 7.11 7.048 6.985 6.922 6.858 6.794 6.729 6.664 6.598 6.532 6.466 6.399 6.333 6.266 6.199 6.132 6.065 5.998 5.931 5.865 5.798 5.732 5.665 5.599 5.534 5.468 5.403 5.338 5.273 5.209 5.145 5.082 5.019 4.956 4.894 4.832 4.771 4.71 4.65 4.59 4.531 4.472 4.414 4.356 4.299 4.242 4.186 4.131 4.076 4.021 3.967 3.914 3.861 3.809 3.757 3.706 3.655 3.605 3.556 3.507 3.459 3.411 3.364 3.317 3.271 3.225 3.18 3.136 3.092 3.049 3.006 2.964 2.922 2.881 2.84 2.8 2.76 2.721 2.682 2.644 2.606 2.569 2.532 2.496 2.46 2.425 2.39 2.356 2.322 2.289 2.256 2.223 2.191 2.16 2.128 2.098 2.067 2.037

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.291" PeakHeight="110.0" Num="3" Error="0.0">
-30.428 13.044 -3.117
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.291" EndFrequency="8.2" PeakHeight="370.44" Num="5" zHalfNm="223.494" Error="4.042">
-228.923 -40.031 18.474 -5.648 1.571
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.883" Depth="0.122"/>
<TopsideChapman PeakHeight="370.44" PeakDensity="834243.2" PeakScaleHeight="104.6" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
