<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 13:40:00.000"
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 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" >
2026.02.01 (032) 13:40:00</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">
FF202603202011340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.379" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.480" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.287" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.312" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="376.208" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.779" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.182" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="172.762" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.749" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="95.666" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="222.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 341.667 343.333 345.000 346.667 348.333 350.000 350.000 360.000 360.000 365.000 365.000 365.000 368.750 372.500 376.250 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 415.000 415.000 425.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 470.000 475.000 485.000 490.000 495.000 505.000 510.000 520.000 525.000 535.000 540.000 540.000 545.000 550.000 555.000 560.000 560.000 565.000 570.000 570.000 570.000 580.000 580.000 590.000 595.000 602.914 612.226 623.343 636.845 653.594 674.919
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 51 0 51 0 51 45 45 48 0 0 48 0 48 0 51 48 54 54 54 54 57 54 54 57 57 57 54 51 51 48 51 57 57 57 57 57 57 57 57 57 54 57 51 54 45 48 51 48 51 51 48 51 51 45 51 51 51 54 54 51 51 48 48 45 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 -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 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -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 -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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.975 113.951 115.0 115.926 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.208 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.211 2.845 3.18 3.287 3.165 3.165 3.23 3.287 3.427 3.574 3.711 3.843 3.974 4.104 4.235 4.367 4.502 4.639 4.777 4.918 5.06 5.203 5.346 5.49 5.632 5.774 5.914 6.053 6.189 6.323 6.455 6.585 6.713 6.839 6.962 7.084 7.204 7.322 7.439 7.554 7.667 7.78 7.891 8.001 8.11 8.219 8.326 8.433 8.539 8.644 8.748 8.85 8.951 9.049 9.144 9.233 9.313 9.38 9.427 9.449 9.45 9.449 9.442 9.431 9.416 9.396 9.372 9.343 9.311 9.275 9.236 9.193 9.147 9.098 9.046 8.991 8.934 8.874 8.811 8.747 8.681 8.612 8.542 8.47 8.397 8.322 8.246 8.169 8.091 8.012 7.931 7.85 7.769 7.687 7.604 7.521 7.437 7.353 7.269 7.185 7.101 7.016 6.932 6.848 6.764 6.68 6.596 6.513 6.43 6.347 6.265 6.183 6.101 6.02 5.939 5.86 5.78 5.701 5.623 5.545 5.468 5.392 5.317 5.242 5.167 5.094 5.021 4.949 4.878 4.807 4.737 4.668 4.6 4.532 4.466 4.4 4.334 4.27 4.206 4.143 4.081 4.02 3.959 3.899 3.84 3.782 3.725 3.668 3.612 3.557 3.502 3.448 3.395 3.343 3.291 3.24 3.19 3.141 3.092 3.044 2.997 2.95 2.904 2.858 2.814 2.77 2.726 2.683 2.641 2.6 2.559 2.518 2.479 2.439 2.401 2.363 2.326 2.289 2.252 2.217 2.182 2.147 2.113 2.079 2.046 2.013

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.287" PeakHeight="110.0" Num="3" Error="0.0">
-30.425 13.039 -3.115
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.287" EndFrequency="9.45" PeakHeight="376.208" Num="5" zHalfNm="238.779" Error="6.367">
-227.236 -54.233 28.776 -11.47 3.881
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.926" Depth="0.122"/>
<TopsideChapman PeakHeight="376.208" PeakDensity="1107971.5" PeakScaleHeight="95.666" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
