<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 23:40:00.000"
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="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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x 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" >
2026.01.30 (030) 23:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603001302340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.861" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.603" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="401.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="361.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="312.730" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.856" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="71.181" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.452" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.771" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 355.000 357.500 360.000 360.000 360.000 365.000 370.000 365.000 360.000 355.000 350.000 365.000 360.000 365.000 365.000 365.000 365.000 365.000 366.000 367.000 368.000 369.000 370.000 370.000 370.000 370.000 370.000 350.000 360.000 365.000 367.500 370.000 375.000 377.500 380.000 382.500 385.000 390.000 395.000 398.333 401.667 405.000 409.444 413.889 418.333 422.778 427.222 431.667 436.111 440.363 446.221 454.807 468.606 494.434
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 0 63 0 57 0 54 60 54 57 51 54 54 57 54 63 54 60 0 0 0 0 57 0 54 57 57 48 54 60 54 54 60 57 54 57 57 54 54 0 54 48 48 48 48 0 45 51 48 45 45 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 1.953125 1.171875 1.953125 1.171875 2.734375 0.390625 1.171875 1.953125 0.390625 1.171875 0.390625 1.171875 1.953125 0.390625 1.171875 -0.390625 0.390625 1.171875 -0.390625 1.953125 -1.953125 1.171875 1.171875 1.953125 0.390625 2.734375 0.390625 0.390625 1.171875 1.953125 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 1.953125 -0.390625 0.390625 0.390625 1.953125 -1.171875 2.734375 1.953125 1.953125 1.171875 2.734375 1.171875 -1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="160">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.808 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.617 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.425 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 361.571 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.285 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.224 0.246 0.268 0.29 0.312 0.334 0.354 0.363 0.453 0.56 0.688 0.837 1.011 1.209 1.435 1.688 1.971 2.282 2.622 2.99 3.384 3.801 4.238 4.69 5.152 5.618 6.08 6.532 6.966 7.373 7.748 8.081 8.368 8.602 8.779 8.894 8.947 8.95 8.943 8.906 8.842 8.754 8.643 8.513 8.367 8.206 8.033 7.85 7.66 7.462 7.261 7.056 6.849 6.641 6.434 6.227 6.022 5.82 5.621 5.425 5.233 5.045 4.861 4.683 4.508 4.339 4.175 4.015 3.861 3.711 3.567 3.427 3.292 3.162 3.036 2.915 2.799 2.686 2.578 2.474 2.374 2.278 2.185 2.096 2.011 1.928 1.849 1.774 1.701 1.631 1.564 1.5 1.438 1.379 1.322 1.267 1.215 1.165 1.116 1.07 1.026 0.983 0.943 0.904 0.866 0.83 0.796 0.763 0.731 0.701 0.672 0.644 0.617 0.591 0.567 0.543 0.521 0.499 0.478 0.458 0.439 0.421 0.404 0.387 0.371 0.355 0.341 0.326 0.313 0.3 0.287 0.275 0.264 0.253 0.242 0.232 0.223 0.213 0.205

</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="8.95" PeakHeight="361.571" Num="5" zHalfNm="312.73" Error="0.878">
-148.29 1.161 -0.027 0.084 -0.074
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.425" Depth="0.154"/>
<TopsideChapman PeakHeight="361.571" PeakDensity="993827.56" PeakScaleHeight="36.771" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
