<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 09:20:00.000"
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="12.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% 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</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" >
2026.10.21 (294) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410210920009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.112" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.606" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.924" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="293.223" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="216.318" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.476" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.824" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.460" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.358" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="108.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.200" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 302.500 305.000 306.667 308.333 310.000 305.000 305.000 310.000 312.500 315.000 315.000 320.000 330.000 338.333 346.667 355.000 370.000 367.500 365.000 375.000 380.000 380.000 387.500 395.000 398.514 402.924 408.621 416.265 427.060 443.461 471.366 529.413
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 60 60 60 57 54 0 51 0 0 0 51 48 0 0 0
</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 1.171875 0.390625 1.953125 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.783 90.0 95.0 100.0 105.0 110.0 115.0 118.634 120.0 125.0 127.269 130.0 135.0 135.903 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.223 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.219 1.289 1.666 1.862 1.924 1.88 1.79 1.79 1.79 1.79 1.832 1.91 1.924 2.072 2.267 2.475 2.696 2.927 3.168 3.419 3.678 3.946 4.222 4.505 4.793 5.086 5.382 5.677 5.969 6.257 6.536 6.803 7.057 7.295 7.515 7.716 7.897 8.056 8.193 8.308 8.401 8.472 8.52 8.545 8.55 8.549 8.539 8.517 8.485 8.443 8.391 8.331 8.263 8.187 8.105 8.016 7.922 7.823 7.72 7.612 7.501 7.387 7.271 7.152 7.031 6.909 6.786 6.662 6.537 6.412 6.287 6.162 6.037 5.913 5.79 5.668 5.546 5.426 5.307 5.19 5.073 4.959 4.846 4.734 4.625 4.517 4.411 4.307 4.204 4.104 4.005 3.908 3.813 3.72 3.629 3.539 3.452 3.366 3.283 3.201 3.121 3.042 2.966 2.891 2.818 2.746 2.676 2.608 2.542 2.477 2.413 2.351 2.291 2.232 2.174 2.118 2.064 2.01 1.958 1.907 1.858 1.81 1.763 1.717 1.672 1.629 1.586 1.545 1.504 1.465 1.427 1.389 1.353 1.318 1.283 1.25 1.217 1.185 1.154 1.123 1.094 1.065 1.037 1.01 0.983 0.958 0.932 0.908 0.884 0.861 0.838 0.816 0.795 0.774 0.753 0.733 0.714 0.695 0.677 0.659 0.642 0.625 0.608 0.592 0.577 0.561 0.547 0.532 0.518 0.504 0.491 0.478 0.466 0.453 0.441 0.43 0.418 0.407 0.397 0.386 0.376 0.366 0.356 0.347 0.338 0.329 0.32

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.924" PeakHeight="110.0" Num="3" Error="0.0">
-28.947 10.955 -2.225
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.924" EndFrequency="8.55" PeakHeight="293.223" Num="5" zHalfNm="216.318" Error="1.719">
-159.775 4.463 -2.842 1.191 -0.357
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.903" Depth="0.134"/>
<TopsideChapman PeakHeight="293.223" PeakDensity="906978.94" PeakScaleHeight="58.358" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
