<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 16:40:00.000"
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) 16:40:00</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">
FF202603202011640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.486" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.482" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.289" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.313" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.104" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.655" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.977" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.008" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.296" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.191" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="192.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 345.000 350.000 350.000 351.250 352.500 353.750 355.000 360.000 361.667 363.333 365.000 365.000 367.500 370.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 397.500 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 520.000 525.000 535.000 535.000 540.000 545.000 550.000 556.421 563.646 571.837 581.202 592.011
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 48 0 48 51 0 51 0 48 45 0 0 51 48 0 48 45 48 45 0 0 48 48 48 51 51 57 54 54 0 51 54 60 63 63 60 63 63 63 66 63 66 63 63 63 60 63 63 63 57 60 57 60 57 45 48 48 57 57 48 57 57 60 63 63 60 57 60 60 54 57 57 54 54 57 57 54 54 45 54 54 54 54 51 51 51 48 45
</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 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -2.734375 -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 -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" >
89.5 90.0 95.0 100.0 105.0 110.0 111.967 113.935 115.0 115.902 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.104 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.212 2.846 3.182 3.289 3.167 3.167 3.233 3.289 3.455 3.632 3.796 3.951 4.101 4.247 4.39 4.532 4.672 4.812 4.951 5.089 5.228 5.366 5.505 5.643 5.782 5.922 6.062 6.202 6.342 6.484 6.626 6.768 6.911 7.055 7.2 7.345 7.492 7.639 7.787 7.936 8.086 8.238 8.39 8.544 8.698 8.854 9.01 9.166 9.323 9.479 9.632 9.781 9.922 10.049 10.154 10.224 10.25 10.25 10.246 10.234 10.214 10.187 10.153 10.112 10.065 10.012 9.953 9.889 9.82 9.747 9.669 9.587 9.501 9.412 9.32 9.225 9.127 9.027 8.924 8.82 8.714 8.606 8.497 8.387 8.277 8.165 8.053 7.94 7.827 7.713 7.6 7.487 7.374 7.261 7.148 7.036 6.925 6.814 6.703 6.594 6.485 6.377 6.271 6.165 6.06 5.956 5.853 5.752 5.651 5.552 5.454 5.357 5.261 5.167 5.074 4.982 4.892 4.802 4.714 4.628 4.542 4.458 4.375 4.294 4.213 4.134 4.057 3.98 3.905 3.831 3.758 3.687 3.617 3.547 3.48 3.413 3.347 3.283 3.22 3.157 3.096 3.036 2.978 2.92 2.863 2.807 2.753 2.699 2.646 2.594 2.544 2.494 2.445 2.397 2.35 2.304 2.258 2.214 2.17 2.128 2.086 2.044 2.004 1.964 1.926 1.887 1.85 1.813 1.778 1.742 1.708 1.674 1.641 1.608 1.576 1.545 1.514 1.484 1.455 1.426 1.397 1.369 1.342 1.315 1.289 1.264

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.289" PeakHeight="110.0" Num="3" Error="0.0">
-30.426 13.042 -3.116
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.289" EndFrequency="10.25" PeakHeight="360.104" Num="5" zHalfNm="251.655" Error="3.689">
-201.428 -65.067 24.722 -3.367 0.938
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.902" Depth="0.122"/>
<TopsideChapman PeakHeight="360.104" PeakDensity="1303505.0" PeakScaleHeight="77.191" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
