<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 11:10:00.000"
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: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.02 (061) 11:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606103021110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.899" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.307" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" 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="2.725" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="310.169" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.997" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.078" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.404" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.538" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.623" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 225.000 225.000 220.000 220.000 225.000 225.000 225.000 225.833 226.667 227.500 228.333 229.167 230.000 235.000 235.000 245.000 245.000 247.500 250.000 250.000 250.000 255.000 255.000 255.000 255.000 260.000 265.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 282.500 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 291.250 292.500 293.750 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 436.981 445.325 455.473 468.083 484.173 505.414
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 51 48 48 45 48 0 48 0 48 0 48 60 54 51 57 45 54 57 60 57 60 60 57 0 51 60 57 0 63 60 60 0 54 63 63 63 63 60 0 63 66 0 63 60 0 54 66 0 0 0 0 0 66 66 0 66 66 66 66 0 0 0 66 66 69 69 69 66 0 66 60 0 66 69 54 63 63 69 57 63 66 51 57 63 66 51 72 63 66 54 63 69 69 60 66 66 66 63 66 57 63 66 60 63 69 60 66 66 69 66 66 66 69 57 63 66 57 66 69 60 63 60 60 63 57 60 57 60 57 51 57 54 54 57 57 57 57 51 51 51 0 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 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 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 -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" >
89.595 90.0 95.0 100.0 105.0 110.0 114.485 115.0 118.97 120.0 123.455 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 310.169 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.831 2.359 2.637 2.725 2.602 2.602 2.602 2.63 2.725 2.772 2.918 3.062 3.207 3.355 3.508 3.667 3.834 4.01 4.197 4.394 4.604 4.827 5.063 5.312 5.573 5.844 6.124 6.411 6.702 6.995 7.287 7.579 7.868 8.153 8.434 8.709 8.979 9.242 9.497 9.742 9.975 10.192 10.387 10.555 10.685 10.77 10.8 10.8 10.792 10.767 10.727 10.672 10.603 10.522 10.429 10.326 10.213 10.092 9.963 9.827 9.684 9.537 9.384 9.228 9.068 8.906 8.741 8.575 8.408 8.239 8.07 7.902 7.733 7.565 7.398 7.233 7.068 6.906 6.744 6.585 6.428 6.273 6.121 5.971 5.823 5.678 5.535 5.395 5.258 5.123 4.991 4.862 4.736 4.612 4.491 4.372 4.257 4.144 4.033 3.925 3.82 3.717 3.617 3.519 3.424 3.331 3.24 3.152 3.066 2.982 2.9 2.82 2.743 2.667 2.594 2.522 2.452 2.385 2.319 2.254 2.192 2.131 2.071 2.014 1.958 1.903 1.85 1.798 1.748 1.699 1.652 1.606 1.561 1.517 1.475 1.433 1.393 1.354 1.316 1.279 1.243 1.208 1.174 1.142 1.109 1.078 1.048 1.019 0.99 0.962 0.935 0.909 0.883 0.858 0.834 0.811 0.788 0.766 0.744 0.723 0.703 0.683 0.664 0.645 0.627 0.609 0.592 0.575 0.559 0.543 0.528 0.513 0.499 0.485 0.471 0.458 0.445 0.432 0.42 0.408 0.397 0.386 0.375 0.364 0.354 0.344

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.725" PeakHeight="110.0" Num="3" Error="0.0">
-29.946 12.341 -2.8
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.725" EndFrequency="10.8" PeakHeight="310.169" Num="5" zHalfNm="235.997" Error="2.77">
-156.996 -32.78 4.782 -3.732 2.012
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.455" Depth="0.123"/>
<TopsideChapman PeakHeight="310.169" PeakDensity="1447146.4" PeakScaleHeight="54.623" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
