<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 23:10:00.000"
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 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" >
2026.03.10 (069) 23:10:00</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">
FF202606903102310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.779" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.785" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="4.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.493" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="401.711" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="359.713" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.958" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.822" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.602" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.338" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="81.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 375.000 415.000 422.000 429.000 436.000 443.000 450.000 475.000 472.500 470.000 467.500 465.000 470.000 470.010 470.021 470.033 470.047 470.062 470.079 470.099 470.122 470.150 470.182 470.220 470.268 470.328 470.406 470.511 470.661 470.892 471.293 472.164 475.493
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 54 0 54 0 0 54 54 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 54 51 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.953125 -0.390625 -0.390625 -2.734375 -1.171875 -0.390625 0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 0.390625 -0.390625 -1.171875 -1.171875 1.171875 0.390625 -1.171875 -1.953125 -1.171875 1.953125 -1.171875 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="135">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.242 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.483 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.725 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 401.711 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.31 0.283 0.244 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.229 0.252 0.274 0.297 0.319 0.342 0.354 0.384 0.441 0.498 0.557 0.62 0.69 0.765 0.848 0.937 1.032 1.131 1.234 1.34 1.447 1.555 1.664 1.773 1.882 1.991 2.101 2.211 2.321 2.433 2.545 2.659 2.775 2.892 3.012 3.134 3.26 3.39 3.525 3.666 3.815 3.974 4.147 4.342 4.56 4.6 4.594 4.566 4.517 4.449 4.365 4.268 4.16 4.043 3.92 3.792 3.661 3.528 3.394 3.261 3.128 2.998 2.869 2.744 2.622 2.503 2.388 2.277 2.17 2.066 1.967 1.872 1.781 1.693 1.61 1.53 1.454 1.381 1.312 1.246 1.183 1.123 1.066 1.011 0.96 0.911 0.864 0.82 0.778 0.738 0.7 0.664 0.63 0.597 0.567 0.537 0.51 0.483 0.458 0.435 0.412 0.391 0.371 0.351 0.333 0.316 0.3 0.284 0.269 0.255 0.242 0.23 0.218 0.206

</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="4.6" PeakHeight="401.711" Num="5" zHalfNm="359.713" Error="5.713">
-150.013 -65.54 37.941 -15.862 4.488
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.725" Depth="0.154"/>
<TopsideChapman PeakHeight="401.711" PeakDensity="262531.03" PeakScaleHeight="29.338" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
