<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 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: 100%</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) 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">
FF202603702061640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.295" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.805" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.800" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" Name="h`Es" 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="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.297" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.317" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="396.117" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.471" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.978" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="183.050" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.511" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.425" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="239.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 565.000 575.000 579.235 583.872 588.970 594.603 600.858 607.847 615.704 624.603 634.766 646.482 660.138 676.258 695.575 719.146
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 51 45 54 48 54 51 48 54 51 57 51 45 57 54 54 57 54 51 54 57 57 57 57 57 57 60 57 57 57 57 51 54 54 54 57 60 57 54 54 54 54 54 51 54 54 51 48 48 45 42 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 130.000 130.000 130.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 51 51 51 48 51 48 51 54 51 51 51
</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
</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" >
89.497 90.0 95.0 100.0 105.0 110.0 111.935 113.87 115.0 115.805 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 396.117 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.218 2.853 3.19 3.297 3.175 3.175 3.246 3.297 3.405 3.536 3.667 3.8 3.934 4.068 4.203 4.338 4.472 4.606 4.74 4.872 5.003 5.133 5.261 5.388 5.514 5.639 5.762 5.884 6.005 6.124 6.243 6.36 6.477 6.592 6.707 6.821 6.934 7.046 7.158 7.269 7.379 7.489 7.599 7.708 7.817 7.926 8.034 8.141 8.249 8.355 8.462 8.567 8.672 8.775 8.877 8.976 9.072 9.164 9.25 9.328 9.395 9.448 9.484 9.499 9.5 9.499 9.493 9.483 9.47 9.452 9.431 9.406 9.377 9.345 9.31 9.272 9.231 9.187 9.14 9.091 9.04 8.986 8.93 8.872 8.812 8.75 8.687 8.622 8.555 8.487 8.418 8.347 8.276 8.203 8.129 8.055 7.98 7.904 7.827 7.75 7.673 7.595 7.516 7.438 7.359 7.28 7.201 7.122 7.043 6.963 6.884 6.805 6.727 6.648 6.57 6.491 6.414 6.336 6.259 6.182 6.106 6.03 5.954 5.879 5.805 5.731 5.657 5.584 5.512 5.44 5.369 5.299 5.229 5.159 5.09 5.022 4.955 4.888 4.822 4.756 4.692 4.627 4.564 4.501 4.439 4.378 4.317 4.257 4.197 4.139 4.081 4.023 3.967 3.911 3.855 3.801 3.747 3.693 3.641 3.588 3.537 3.486 3.436 3.387 3.338 3.29 3.242 3.195 3.149 3.103 3.058 3.014 2.97 2.926 2.884 2.842 2.8 2.759 2.719 2.679 2.639 2.6 2.562 2.524 2.487 2.45

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.297" PeakHeight="110.0" Num="3" Error="0.0">
-30.433 13.051 -3.121
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.297" EndFrequency="9.5" PeakHeight="396.117" Num="5" zHalfNm="250.471" Error="2.316">
-245.522 -56.124 28.266 -8.028 1.096
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.805" Depth="0.122"/>
<TopsideChapman PeakHeight="396.117" PeakDensity="1119727.0" PeakScaleHeight="102.425" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
