<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 13:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.05 (036) 13:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603602051300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.411" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.024" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="3.196" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.269" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="394.538" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.884" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="200.169" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.756" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.679" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="228.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.680" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="77">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 325.000 330.000 335.000 338.000 341.000 344.000 347.000 350.000 355.000 357.000 359.000 361.000 363.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 387.500 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 415.000 415.000 415.000 425.000 430.000 432.500 435.000 435.000 445.000 450.000 450.000 455.000 460.000 465.000 475.000 480.000 485.000 490.000 500.000 510.000 515.000 525.000 530.000 540.000 550.000 555.000 560.000 570.000 575.000 585.000 590.000 597.111 605.056 613.989 624.107 635.664 648.989 664.521 682.860 704.840 731.667 765.142
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 45 0 0 0 0 48 48 0 0 0 0 51 48 54 57 60 54 57 57 57 57 54 0 51 57 54 60 57 60 51 57 51 48 0 60 51 45 0 57 57 60 60 54 54 54 57 54 60 63 63 63 63 60 57 51 51 54 48 48 54 54 54 51 51 54 54 54 51 48 45 51 45 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 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 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" >
89.514 90.0 95.0 100.0 105.0 110.0 112.363 114.726 115.0 117.089 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.538 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.149 2.766 3.092 3.196 3.074 3.074 3.088 3.196 3.286 3.426 3.557 3.683 3.809 3.934 4.061 4.191 4.323 4.458 4.596 4.738 4.883 5.031 5.181 5.332 5.485 5.638 5.79 5.942 6.092 6.241 6.387 6.531 6.672 6.811 6.947 7.081 7.212 7.34 7.466 7.59 7.711 7.829 7.946 8.06 8.172 8.281 8.388 8.493 8.596 8.695 8.792 8.886 8.976 9.062 9.144 9.221 9.292 9.356 9.413 9.462 9.5 9.528 9.545 9.55 9.55 9.548 9.542 9.532 9.519 9.502 9.482 9.459 9.433 9.404 9.372 9.337 9.3 9.26 9.218 9.173 9.126 9.078 9.027 8.974 8.919 8.863 8.805 8.746 8.685 8.623 8.56 8.495 8.43 8.363 8.295 8.227 8.158 8.088 8.017 7.946 7.874 7.802 7.729 7.656 7.582 7.509 7.435 7.361 7.287 7.212 7.138 7.064 6.989 6.915 6.841 6.767 6.693 6.62 6.546 6.473 6.4 6.328 6.255 6.183 6.112 6.041 5.97 5.9 5.83 5.76 5.691 5.623 5.555 5.487 5.42 5.354 5.288 5.222 5.158 5.093 5.029 4.966 4.904 4.842 4.78 4.719 4.659 4.599 4.54 4.482 4.424 4.367 4.31 4.254 4.198 4.143 4.089 4.035 3.982 3.93 3.878 3.826 3.776 3.725 3.676 3.627 3.578 3.53 3.483 3.436 3.39 3.344 3.299 3.255 3.211 3.167 3.124 3.082 3.04 2.998 2.958 2.917 2.877 2.838 2.799 2.761

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.196" PeakHeight="110.0" Num="3" Error="0.0">
-30.354 12.936 -3.068
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.196" EndFrequency="9.55" PeakHeight="394.538" Num="5" zHalfNm="242.884" Error="6.229">
-261.363 -26.696 15.178 -7.839 3.271
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.089" Depth="0.122"/>
<TopsideChapman PeakHeight="394.538" PeakDensity="1131544.6" PeakScaleHeight="109.679" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
