<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 22:40:00.000"
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="14.0">
<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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% 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, Trace overlaps while constructing baseline</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" >
2026.10.30 (303) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630310302240009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.659" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.635" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="498.759" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="425.989" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="389.323" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.086" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.648" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.717" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.970" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
505.000 500.000 485.000 510.000 505.000 485.000 505.000 505.000 503.929 420.000 422.826 425.652 428.478 431.304 434.130 436.957 439.783 442.609 445.435 448.261 451.087 453.913 456.739 459.565 462.391 465.217 468.043 470.870 473.696 476.522 479.348 482.436 487.710 498.759 536.539
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 54 54 57 0 57 57 0 60 0 0 0 60 0 57 0 0 0 0 0 0 0 0 63 0 0 0 0 0 0 0 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -0.390625 -0.390625 -1.171875 1.171875 -0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.953125 -1.953125 -1.171875 -1.953125 -2.734375 -1.171875 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="137">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.872 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.745 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.617 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 425.989 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.233 0.256 0.278 0.301 0.324 0.347 0.354 0.37 0.4 0.441 0.495 0.56 0.628 0.695 0.758 0.818 0.877 0.933 0.989 1.045 1.1 1.155 1.211 1.267 1.325 1.383 1.443 1.504 1.566 1.631 1.698 1.768 1.84 1.916 1.995 2.078 2.166 2.26 2.36 2.467 2.583 2.71 2.848 3.001 3.17 3.357 3.559 3.759 3.921 3.998 4.0 3.993 3.965 3.918 3.855 3.779 3.691 3.594 3.49 3.381 3.267 3.151 3.034 2.916 2.798 2.682 2.568 2.456 2.346 2.24 2.137 2.037 1.94 1.847 1.758 1.672 1.59 1.511 1.436 1.364 1.295 1.23 1.167 1.108 1.051 0.998 0.946 0.898 0.851 0.807 0.765 0.726 0.688 0.652 0.618 0.586 0.556 0.527 0.499 0.473 0.448 0.425 0.403 0.382 0.362 0.343 0.325 0.308 0.292 0.276 0.262 0.248 0.235 0.223 0.211 0.2

</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="4.0" PeakHeight="425.989" Num="5" zHalfNm="389.323" Error="13.466">
-160.947 -77.429 27.714 2.616 -6.326
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.617" Depth="0.154"/>
<TopsideChapman PeakHeight="425.989" PeakDensity="198511.17" PeakScaleHeight="28.97" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
