<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 09:10:00.000"
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 1 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.21 (080) 09:10:00</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">
FF202608003210910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="7.352" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="3.423" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.209" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.583" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="371.030" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.002" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.283" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="301.400" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="232.048" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="261.664" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="39.645" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="29.992" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.180" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.228" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.070" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.090" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.45 3.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 293.333 296.667 300.000 300.000 300.000 300.000 301.000 302.000 303.000 304.000 305.000 306.000 307.000 308.000 309.000 310.000 312.500 315.000 317.500 320.000 321.852 323.704 325.556 327.407 329.259 331.111 332.963 334.815 336.667 338.519 340.370 342.222 344.074 345.926 347.778 349.630 351.481 353.333 355.185 357.037 358.889 360.741 362.593 364.444 366.296 366.326 366.358 366.395 366.437 366.485 366.540 366.605 366.681 366.773 366.885 367.027 367.209 367.453 367.797 368.319 369.204 371.030 377.015
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 66 66 75 63 69 63 66 69 0 63 0 0 60 57 63 0 66 66 0 66 0 0 69 63 60 60 63 0 63 54 0 57 60 0 0 75 0 0 69 0 0 0 63 60 0 0 0 60 0 0 0 0 60 54 57 0 0 0 51 0 63 72 66 66 66 63 60 66 0 63 0 57 60 51 60 54 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 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 1.171875 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 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 -0.390625 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 272.500 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 265.000 265.000 265.000 265.000 265.000 267.222 269.444 271.667 273.889 276.111 278.333 280.556 282.778 285.000 285.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 0 63 57 63 0 0 63 69 72 66 63 0 69 66 63 0 60 0 0 0 0 0 0 60 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="117">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.048 95.0 100.0 105.0 110.0 115.0 120.0 123.041 125.0 130.0 135.0 136.082 140.0 145.0 149.123 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 232.048 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 301.4 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.856 1.112 1.242 1.283 1.26 1.191 1.123 1.123 1.123 1.123 1.123 1.171 1.232 1.283 1.306 1.412 1.5 1.583 1.664 1.747 1.833 1.924 2.021 2.128 2.246 2.381 2.54 2.732 2.968 3.229 3.405 3.423 3.597 3.922 4.249 4.557 4.844 5.112 5.368 5.616 5.86 6.105 6.355 6.618 6.907 7.263 7.352 7.339 7.28 7.18 7.045 6.882 6.695 6.489 6.27 6.041 5.806 5.567 5.328 5.09 4.856 4.625 4.4 4.182 3.97 3.766 3.57 3.381 3.201 3.029 2.864 2.707 2.558 2.417 2.282 2.155 2.034 1.919 1.811 1.708 1.611 1.52 1.433 1.351 1.274 1.201 1.132 1.067 1.006 0.948 0.894 0.842 0.794 0.748 0.705 0.664 0.626 0.59 0.556 0.524 0.494 0.465 0.438 0.413 0.389 0.367 0.345 0.325 0.307 0.289 0.272 0.256 0.242 0.228 0.214 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.283" PeakHeight="110.0" Num="3" Error="0.0">
-27.546 9.18 -1.586
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="1.283" EndFrequency="3.423" PeakHeight="232.048" Num="5" Error="0.0">
-55.181 -30.521 -0.521 3.09 0.208
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.423" EndFrequency="7.352" PeakHeight="301.4" Num="5" zHalfNm="261.664" Error="1.902">
-49.931 -28.074 11.206 -2.575 0.022
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="39.123" Depth="0.16"/>
<TopsideChapman PeakHeight="301.4" PeakDensity="670619.2" PeakScaleHeight="26.228" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
