<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 18:40:00.000"
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" >
2026.02.02 (033) 18:40:00</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">
FF202603302021840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.369" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.291" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" 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="2.880" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="410.397" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="304.032" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.587" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.981" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.408" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.683" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="193.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 315.000 319.000 323.000 327.000 331.000 335.000 337.500 340.000 345.000 347.857 350.714 353.571 356.429 359.286 362.143 365.000 365.000 368.125 371.250 374.375 377.500 380.625 383.750 386.875 390.000 392.500 395.000 395.000 400.000 400.000 405.000 405.000 407.500 410.000 415.000 415.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 500.000 505.000 505.000 505.000 510.000 510.000 510.000 510.000 515.000 515.000 515.000 515.000 520.000 520.000 520.000 520.000 520.000 525.000 525.000 525.000 525.000 530.000 530.000 535.000 535.000 535.000 540.000 540.000 542.500 545.000 550.000 555.000 555.000 560.000 565.000 565.000 570.000 575.000 580.000 585.000 592.500 600.000 605.000 612.500 622.565 634.440 648.661
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 48 0 0 48 0 54 0 0 0 0 48 0 0 0 0 51 48 0 54 0 0 0 0 0 51 0 51 60 57 63 57 60 0 54 48 54 0 54 60 63 0 45 51 0 0 51 54 54 57 51 57 51 54 54 63 66 63 66 63 66 60 66 63 66 63 63 60 48 51 45 57 51 57 60 57 63 63 63 60 57 48 57 63 63 60 60 57 54 57 57 54 0 45 54 60 51 54 54 54 51 0 0 48 51 45 51 48 48 48 45 0 45 48 0 45 45 0 42 45 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 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 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 -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 -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 1.953125 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -2.734375
</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" >
89.567 90.0 95.0 100.0 105.0 110.0 113.761 115.0 117.523 120.0 121.284 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.397 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.936 2.493 2.786 2.88 2.758 2.758 2.758 2.838 2.88 2.993 3.137 3.275 3.409 3.541 3.67 3.798 3.926 4.053 4.18 4.307 4.434 4.561 4.689 4.818 4.947 5.076 5.207 5.338 5.47 5.603 5.736 5.871 6.007 6.143 6.281 6.42 6.56 6.701 6.843 6.987 7.132 7.278 7.426 7.575 7.726 7.879 8.033 8.188 8.346 8.506 8.667 8.83 8.996 9.163 9.333 9.504 9.677 9.852 10.027 10.203 10.377 10.547 10.71 10.858 10.981 11.066 11.1 11.1 11.096 11.083 11.062 11.033 10.996 10.952 10.9 10.843 10.779 10.709 10.634 10.553 10.468 10.379 10.285 10.188 10.087 9.983 9.876 9.767 9.655 9.541 9.426 9.308 9.19 9.07 8.948 8.827 8.704 8.581 8.458 8.334 8.211 8.087 7.964 7.841 7.718 7.596 7.475 7.354 7.234 7.115 6.997 6.879 6.763 6.648 6.534 6.421 6.309 6.199 6.09 5.982 5.875 5.77 5.666 5.564 5.463 5.363 5.265 5.168 5.073 4.979 4.886 4.795 4.705 4.617 4.53 4.444 4.36 4.277 4.196 4.116 4.037 3.96 3.884 3.809 3.735 3.663 3.592 3.523 3.454 3.387 3.321 3.256 3.193 3.13 3.069 3.009 2.95 2.892 2.835 2.779 2.724 2.671 2.618 2.566 2.515 2.466 2.417 2.369 2.322 2.276 2.231 2.186 2.143 2.1 2.058 2.017 1.977 1.938 1.899 1.861 1.824 1.788 1.752 1.717 1.683 1.649

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.88" PeakHeight="110.0" Num="3" Error="0.0">
-30.092 12.552 -2.893
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.88" EndFrequency="11.1" PeakHeight="410.397" Num="5" zHalfNm="304.032" Error="1.929">
-230.934 -84.36 29.392 -4.074 0.863
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.284" Depth="0.122"/>
<TopsideChapman PeakHeight="410.397" PeakDensity="1528660.0" PeakScaleHeight="76.683" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
