<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 14:00:00.000"
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" >
2026.02.04 (035) 14:00:00</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">
FF202603502041400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.186" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.328" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="3.325" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.330" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="457.855" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.008" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.257" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="255.084" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="64.094" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="141.286" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="290.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="69">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 400.000 400.000 403.333 406.667 410.000 410.000 415.000 415.000 417.500 420.000 420.000 425.000 430.000 435.000 437.500 440.000 440.000 445.000 445.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 480.000 490.000 490.000 495.000 500.000 510.000 515.000 520.000 525.000 535.000 540.000 550.000 555.000 565.000 570.000 580.000 590.000 600.000 605.000 615.000 625.000 630.000 640.000 645.000 655.000 660.000 665.000 675.000 680.000 690.000 700.000 710.000 725.000 741.120 760.437 784.008 813.412 851.118 901.221 971.038
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 0 0 51 51 48 51 0 51 48 51 48 45 0 45 54 51 0 51 54 57 51 54 54 54 51 51 54 45 54 54 51 57 57 57 54 57 57 57 54 57 57 54 54 57 57 57 54 54 51 51 48 54 54 51 51 51 48 51 48 48 45 0 0 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 -0.390625 -0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 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 -0.390625 1.171875
</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" >
89.493 90.0 95.0 100.0 105.0 110.0 111.818 113.636 115.0 115.454 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 457.855 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.237 2.878 3.217 3.325 3.202 3.202 3.294 3.325 3.427 3.535 3.639 3.741 3.842 3.944 4.045 4.147 4.25 4.355 4.46 4.566 4.674 4.783 4.893 5.004 5.116 5.229 5.342 5.455 5.569 5.683 5.797 5.91 6.023 6.136 6.247 6.358 6.467 6.576 6.683 6.79 6.895 6.998 7.101 7.202 7.301 7.4 7.496 7.592 7.686 7.778 7.869 7.958 8.045 8.131 8.215 8.297 8.378 8.456 8.532 8.606 8.677 8.745 8.811 8.874 8.934 8.99 9.042 9.091 9.135 9.174 9.209 9.238 9.262 9.28 9.293 9.299 9.3 9.3 9.298 9.293 9.287 9.278 9.268 9.255 9.241 9.224 9.206 9.186 9.164 9.141 9.116 9.089 9.061 9.031 9.0 8.967 8.933 8.898 8.862 8.824 8.786 8.746 8.705 8.663 8.62 8.576 8.532 8.486 8.44 8.392 8.345 8.296 8.247 8.197 8.147 8.096 8.044 7.992 7.94 7.887 7.833 7.78 7.726 7.671 7.617 7.562 7.507 7.452 7.396 7.34 7.285 7.229 7.173 7.117 7.061 7.004 6.948 6.892 6.836 6.78 6.723 6.667 6.611 6.556 6.5 6.444 6.389 6.333 6.278 6.223 6.168 6.114 6.059 6.005 5.951 5.897 5.843 5.79 5.737 5.684 5.631 5.579 5.527 5.475 5.424 5.373 5.322 5.271 5.221 5.171 5.122 5.072 5.023 4.975 4.926 4.878 4.831 4.783 4.736 4.69 4.643 4.597 4.552 4.506 4.462 4.417

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.325" PeakHeight="110.0" Num="3" Error="0.0">
-30.454 13.082 -3.135
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.325" EndFrequency="9.3" PeakHeight="457.855" Num="5" zHalfNm="265.008" Error="4.79">
-326.615 -25.133 12.494 -5.351 2.204
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.454" Depth="0.123"/>
<TopsideChapman PeakHeight="457.855" PeakDensity="1073076.9" PeakScaleHeight="141.286" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
