<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 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" >
2026.02.06 (037) 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">
FF202603702061300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.460" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.137" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="7.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.197" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.270" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="392.526" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.815" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="218.928" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.624" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="119.688" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="243.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.810" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 220.833 226.667 232.500 238.333 244.167 250.000 255.000 260.000 270.000 280.000 285.000 290.000 295.000 300.000 310.000 315.000 320.000 325.000 326.667 328.333 330.000 330.000 330.000 335.000 336.250 337.500 338.750 340.000 345.000 345.000 348.000 351.000 354.000 357.000 360.000 362.500 365.000 370.000 372.500 375.000 375.000 375.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 425.000 425.000 430.000 435.000 440.000 440.000 450.000 455.000 460.000 465.000 475.000 480.000 490.000 500.000 510.000 520.000 525.000 535.000 545.000 555.000 565.000 575.000 585.000 593.711 603.490 614.546 627.147 641.641 658.490 678.317 701.990 730.746 766.421 811.853
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 0 0 0 48 45 45 48 51 57 54 60 48 54 0 48 45 0 0 54 57 57 57 0 0 0 57 57 51 0 0 0 0 57 0 54 48 0 54 60 54 60 57 60 57 51 57 51 57 60 57 60 60 60 57 63 60 57 60 60 63 63 63 63 66 63 60 60 60 60 63 60 60 60 60 60 60 60 57 57 57 57 57 54 54 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 0.390625 0.390625 -2.734375 -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 -1.953125 -0.390625 1.953125 1.171875 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 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" >
89.513 90.0 95.0 100.0 105.0 110.0 112.358 114.717 115.0 117.075 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.526 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.15 2.767 3.093 3.197 3.075 3.075 3.09 3.197 3.271 3.399 3.531 3.665 3.803 3.945 4.09 4.239 4.39 4.543 4.697 4.852 5.006 5.158 5.309 5.458 5.604 5.747 5.887 6.025 6.16 6.291 6.42 6.546 6.669 6.79 6.908 7.023 7.137 7.247 7.356 7.462 7.566 7.667 7.767 7.863 7.958 8.05 8.139 8.226 8.309 8.39 8.467 8.54 8.61 8.675 8.736 8.791 8.841 8.884 8.922 8.952 8.975 8.991 8.999 9.0 9.0 8.997 8.991 8.982 8.97 8.956 8.939 8.92 8.898 8.873 8.847 8.818 8.787 8.754 8.719 8.682 8.644 8.604 8.562 8.518 8.473 8.426 8.378 8.329 8.279 8.227 8.174 8.121 8.066 8.01 7.953 7.896 7.838 7.779 7.719 7.659 7.599 7.537 7.476 7.414 7.351 7.289 7.225 7.162 7.099 7.035 6.971 6.907 6.843 6.779 6.714 6.65 6.586 6.522 6.458 6.394 6.33 6.266 6.203 6.14 6.077 6.014 5.951 5.889 5.827 5.765 5.703 5.642 5.581 5.521 5.461 5.401 5.341 5.282 5.224 5.166 5.108 5.05 4.993 4.937 4.881 4.825 4.77 4.715 4.66 4.606 4.553 4.5 4.447 4.395 4.344 4.293 4.242 4.192 4.142 4.093 4.044 3.996 3.948 3.901 3.854 3.807 3.761 3.716 3.671 3.626 3.582 3.538 3.495 3.453 3.41 3.369 3.327 3.286 3.246 3.206 3.166 3.127 3.088 3.05 3.012 2.975

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.197" PeakHeight="110.0" Num="3" Error="0.0">
-30.355 12.937 -3.069
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.197" EndFrequency="9.0" PeakHeight="392.526" Num="5" zHalfNm="227.815" Error="7.597">
-272.941 -9.673 12.316 -6.599 1.446
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.075" Depth="0.122"/>
<TopsideChapman PeakHeight="392.526" PeakDensity="1004962.75" PeakScaleHeight="119.688" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
