<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 05:30:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, 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" >
2026.03.11 (070) 05:30:00</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">
FF202607003110530009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.109" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.676" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="372.098" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="340.786" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="298.786" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.618" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="61.879" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.171" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.254" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="62.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="83">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 282.500 285.000 290.000 293.333 296.667 300.000 305.000 310.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 337.273 339.545 341.818 344.091 346.364 348.636 350.909 353.182 355.455 357.727 360.000 370.000 380.000 389.000 398.000 407.000 416.000 425.000 445.000 440.000 435.000 435.000 417.500 400.000 405.000 410.000 395.000 380.000 365.000 370.000 372.098 375.059 379.550 387.173 402.962 455.151
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 66 66 69 72 72 69 69 69 0 66 0 0 0 0 66 0 0 72 66 0 0 72 63 0 60 0 60 0 0 57 63 69 78 0 78 69 69 63 60 66 0 69 0 63 54 66 60 0 60 54 60 63 60 0 60 60 63 54 0 0 0 0 54 48 0 54 51 0 57 0 57 51 63 66 69 0 60 63 63 0 51
</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 -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 -1.171875 -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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -2.734375 -1.953125 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="132">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.167 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.333 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.5 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.786 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.315 0.291 0.258 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.233 0.254 0.275 0.297 0.318 0.339 0.354 0.437 0.549 0.657 0.783 0.943 1.161 1.461 1.834 2.225 2.597 2.946 3.275 3.59 3.894 4.191 4.483 4.772 5.058 5.342 5.623 5.897 6.158 6.391 6.568 6.648 6.65 6.638 6.594 6.521 6.423 6.305 6.168 6.017 5.854 5.682 5.503 5.32 5.134 4.946 4.759 4.573 4.389 4.208 4.031 3.858 3.689 3.526 3.367 3.214 3.067 2.925 2.788 2.657 2.531 2.41 2.294 2.184 2.078 1.977 1.881 1.789 1.701 1.617 1.537 1.462 1.389 1.32 1.255 1.192 1.133 1.077 1.023 0.972 0.923 0.877 0.833 0.791 0.752 0.714 0.678 0.644 0.612 0.581 0.552 0.524 0.498 0.473 0.449 0.427 0.405 0.385 0.366 0.347 0.33 0.313 0.297 0.282 0.268 0.255 0.242 0.23 0.218 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.65" PeakHeight="340.786" Num="5" zHalfNm="298.786" Error="8.73">
-120.932 -8.468 11.156 -9.21 5.168
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.5" Depth="0.154"/>
<TopsideChapman PeakHeight="340.786" PeakDensity="548666.25" PeakScaleHeight="30.254" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
