<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 12:50:00.000"
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" >
2026.03.13 (072) 12:50:00</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">
FF202607203131250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.894" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.896" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="405.688" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.205" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.274" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="323.547" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.665" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.262" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.498" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.415" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.954" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="126.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="152">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 305.000 306.250 307.500 308.750 310.000 310.000 310.000 310.000 313.333 316.667 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 347.500 350.000 347.500 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 362.500 365.000 362.500 360.000 360.000 362.500 365.000 365.000 365.000 370.000 367.500 365.000 370.000 370.000 370.000 371.250 372.500 373.750 375.000 376.000 377.000 378.000 379.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 400.000 402.710 405.688 408.976 412.623 416.694 421.266 426.437 432.335 439.122 447.018 456.318 467.432 480.951 497.746 519.177 547.466
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 54 0 57 57 60 60 60 60 57 57 57 60 57 57 57 57 57 57 54 57 60 60 60 57 57 54 57 60 0 57 54 60 57 0 57 57 0 0 0 60 60 60 57 0 0 54 57 0 63 63 60 63 60 63 60 60 60 66 63 60 0 63 63 63 60 63 63 66 63 63 63 0 54 0 66 60 63 0 63 63 60 63 60 60 63 0 63 60 60 60 0 57 0 60 0 48 0 57 54 0 54 57 57 45 45 54 51 54 54 0 0 0 51 0 54 0 0 51 54 0 51 54 42 0 54 51 51 42 0 54 0 48 45 54 0 51 51 54 51 54 54 51 42 51 48 42 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 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" >
89.512 90.0 95.0 100.0 105.0 110.0 112.322 114.644 115.0 116.966 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 323.547 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.155 2.774 3.101 3.205 3.083 3.083 3.102 3.205 3.346 3.555 3.747 3.929 4.106 4.28 4.453 4.626 4.799 4.975 5.153 5.335 5.521 5.711 5.907 6.109 6.318 6.534 6.759 6.993 7.237 7.493 7.76 8.041 8.337 8.646 8.971 9.311 9.663 10.025 10.391 10.756 11.11 11.444 11.751 12.022 12.253 12.441 12.585 12.684 12.739 12.75 12.749 12.734 12.702 12.652 12.587 12.508 12.415 12.309 12.193 12.065 11.928 11.783 11.63 11.47 11.305 11.134 10.958 10.779 10.596 10.41 10.223 10.034 9.844 9.653 9.462 9.271 9.08 8.89 8.702 8.514 8.328 8.144 7.962 7.781 7.603 7.428 7.255 7.084 6.916 6.751 6.589 6.429 6.273 6.119 5.968 5.82 5.675 5.533 5.394 5.258 5.125 4.995 4.868 4.743 4.621 4.502 4.386 4.273 4.162 4.054 3.948 3.845 3.744 3.646 3.55 3.457 3.366 3.277 3.191 3.106 3.024 2.944 2.866 2.79 2.715 2.643 2.573 2.504 2.437 2.372 2.309 2.247 2.187 2.128 2.071 2.016 1.962 1.909 1.858 1.808 1.759 1.712 1.666 1.621 1.578 1.535 1.494 1.454 1.414 1.376 1.339 1.303 1.268 1.234 1.201 1.168 1.137 1.106 1.076 1.047 1.019 0.991 0.964 0.938 0.913 0.888 0.864 0.841 0.818 0.796 0.775 0.754 0.733 0.714 0.694 0.676 0.657 0.639 0.622 0.605 0.589 0.573 0.558 0.543 0.528 0.514

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.205" PeakHeight="110.0" Num="3" Error="0.0">
-30.361 12.946 -3.073
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.205" EndFrequency="12.75" PeakHeight="323.547" Num="5" zHalfNm="250.665" Error="2.879">
-172.231 -39.66 -0.559 6.441 -0.572
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.966" Depth="0.122"/>
<TopsideChapman PeakHeight="323.547" PeakDensity="2016904.5" PeakScaleHeight="56.954" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
