<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 13:00:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.18 (077) 13:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607703181300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.556" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.643" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="390.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.238" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.289" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="349.326" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.501" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.301" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="167.610" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.658" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="91.906" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="199.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 210.000 211.429 212.857 214.286 215.714 217.143 218.571 220.000 225.000 230.333 235.667 241.000 246.333 251.667 257.000 262.333 267.667 273.000 278.333 283.667 289.000 294.333 299.667 305.000 302.500 300.000 300.000 310.000 300.000 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 328.125 331.250 334.375 337.500 340.625 343.750 346.875 350.000 355.000 357.500 360.000 360.000 365.000 370.000 370.000 375.000 380.000 385.000 385.000 390.000 390.000 400.000 405.000 410.000 415.000 420.000 420.000 425.000 435.000 440.000 445.000 450.000 450.000 455.000 460.000 470.000 475.000 480.000 485.000 495.000 500.000 510.000 514.897 520.259 526.153 532.665 539.897 547.975 557.056 567.339 579.082 592.617 608.390 627.005 649.306
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 54 0 0 0 0 0 0 51 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 51 60 60 48 57 57 57 60 57 60 0 63 63 60 60 60 54 60 60 57 48 0 0 0 0 48 0 0 0 57 51 0 51 48 51 51 54 51 54 48 54 57 60 66 66 63 63 63 60 63 69 60 63 57 57 57 57 60 57 57 54 48 54 54 63 57 60 57 66 63 66 60 60 57 54 51 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 -2.734375 0.390625 -1.953125 -1.953125 0.390625 0.390625 1.953125 -1.171875 -2.734375 1.171875 0.390625 -1.171875 2.734375 1.171875 -2.734375 -1.171875 -1.953125 -1.171875 -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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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" >
89.507 90.0 95.0 100.0 105.0 110.0 112.183 114.366 115.0 116.549 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.326 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.178 2.802 3.133 3.238 3.116 3.116 3.151 3.238 3.345 3.492 3.635 3.778 3.923 4.072 4.226 4.385 4.548 4.717 4.889 5.063 5.239 5.414 5.588 5.759 5.926 6.09 6.249 6.404 6.556 6.703 6.846 6.986 7.122 7.256 7.386 7.514 7.639 7.762 7.882 8.0 8.116 8.23 8.342 8.451 8.558 8.662 8.762 8.858 8.948 9.032 9.105 9.167 9.214 9.242 9.25 9.25 9.247 9.238 9.225 9.206 9.184 9.156 9.125 9.09 9.05 9.008 8.961 8.912 8.859 8.803 8.745 8.684 8.62 8.554 8.486 8.416 8.344 8.271 8.196 8.119 8.041 7.962 7.882 7.801 7.719 7.636 7.552 7.468 7.383 7.298 7.213 7.127 7.042 6.956 6.87 6.784 6.698 6.612 6.527 6.442 6.357 6.272 6.188 6.104 6.021 5.938 5.856 5.774 5.693 5.612 5.532 5.453 5.374 5.296 5.219 5.143 5.067 4.992 4.918 4.844 4.772 4.7 4.629 4.558 4.489 4.42 4.352 4.285 4.219 4.154 4.089 4.026 3.963 3.901 3.839 3.779 3.719 3.661 3.603 3.545 3.489 3.433 3.378 3.324 3.271 3.218 3.167 3.116 3.065 3.016 2.967 2.919 2.872 2.825 2.779 2.734 2.689 2.645 2.602 2.559 2.517 2.476 2.435 2.395 2.356 2.317 2.279 2.242 2.205 2.168 2.132 2.097 2.062 2.028 1.995 1.962 1.929 1.897 1.866 1.835 1.804 1.774 1.745 1.716 1.687 1.659

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.238" PeakHeight="110.0" Num="3" Error="0.0">
-30.387 12.984 -3.09
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.238" EndFrequency="9.25" PeakHeight="349.326" Num="5" zHalfNm="219.501" Error="7.811">
-213.898 -31.227 19.143 -9.829 3.034
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.549" Depth="0.122"/>
<TopsideChapman PeakHeight="349.326" PeakDensity="1061569.5" PeakScaleHeight="91.906" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
