<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 75%</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" >
2026.02.04 (035) 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">
FF202603502041840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.305" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.933" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.000" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.550" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="94.371" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.506" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.051" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.883" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="409.535" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.092" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.587" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="186.416" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.180" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="103.928" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="233.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 315.000 315.000 319.000 323.000 327.000 331.000 335.000 335.000 340.000 345.000 350.000 355.000 360.000 365.000 366.667 368.333 370.000 370.000 376.250 382.500 388.750 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 505.000 510.000 515.000 515.000 525.000 530.000 530.000 535.000 540.000 540.000 540.000 545.000 545.000 550.000 555.000 560.000 560.000 565.000 568.810 573.038 577.759 583.064 589.068 595.919 603.810 612.996 623.827 636.787 652.571 672.215 697.335 730.589 776.691
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 63 54 60 0 0 0 63 60 63 63 63 63 60 48 0 0 54 0 63 0 0 57 54 66 66 66 66 57 66 60 69 69 69 66 69 66 69 66 66 69 60 54 66 66 66 63 66 60 54 63 60 69 66 69 69 69 66 66 66 63 63 66 63 60 57 66 63 57 66 63 66 63 63 63 63 60 63 63 60 60 60 60 57 60 57 57 54 51 51 0 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
94.371 95.308 96.334 97.468 98.737 100.180 101.855 103.863 106.387 109.837 115.509
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 66 54 0 0 0 51 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.526 111.053 111.579 112.105 112.632 113.158 113.684 114.211 114.737 115.263 115.789 116.316 116.842 117.368 117.895 118.421 118.947 119.474 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 125.000 125.000 125.000 120.000 110.000 115.000 116.000 117.000 118.000 119.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 57 60 63 63 63 63 66 66 66 66 60 63 60 60 0 0 0 57 48 57 0 57 60 0 0 0 0 0 0 0 0 0 60 66 66 66 66 66 66 66 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 45 48 48 0 48 48 54 57 57 60 57 0 51 48 0 48 51 45 45 0 0 0 0 51 51 0 45 48 45 45 0 0 48 0 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
85.222 90.0 95.0 95.506 99.253 100.0 102.999 105.0 106.746 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 409.535 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.561 3.056 3.06 2.93 2.93 2.93 2.999 3.06 3.145 3.274 3.402 3.529 3.654 3.779 3.903 4.027 4.15 4.273 4.395 4.518 4.64 4.762 4.884 5.006 5.128 5.25 5.372 5.495 5.617 5.74 5.863 5.986 6.11 6.234 6.358 6.482 6.607 6.732 6.857 6.983 7.109 7.235 7.362 7.488 7.615 7.742 7.869 7.996 8.122 8.249 8.374 8.499 8.624 8.746 8.867 8.986 9.103 9.216 9.325 9.429 9.527 9.618 9.701 9.774 9.836 9.886 9.922 9.944 9.95 9.95 9.947 9.94 9.929 9.914 9.895 9.872 9.845 9.815 9.781 9.745 9.705 9.662 9.616 9.568 9.517 9.463 9.408 9.35 9.29 9.228 9.164 9.098 9.031 8.963 8.892 8.821 8.748 8.674 8.599 8.524 8.447 8.369 8.291 8.212 8.133 8.053 7.973 7.892 7.811 7.729 7.648 7.566 7.485 7.403 7.321 7.239 7.158 7.076 6.995 6.914 6.833 6.753 6.673 6.593 6.514 6.435 6.356 6.278 6.2 6.123 6.046 5.97 5.894 5.819 5.745 5.671 5.598 5.525 5.453 5.382 5.311 5.241 5.171 5.103 5.034 4.967 4.9 4.834 4.769 4.704 4.64 4.577 4.514 4.452 4.391 4.33 4.271 4.211 4.153 4.095 4.038 3.981 3.926 3.871 3.816 3.762 3.709 3.657 3.605 3.554 3.504 3.454 3.405 3.356 3.308 3.261 3.214 3.168 3.122 3.078 3.033 2.99 2.946 2.904 2.862 2.821 2.78 2.739

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.06" PeakHeight="95.506" Num="3" Error="0.965">
-15.199 6.42 -1.505
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.06" EndFrequency="9.95" PeakHeight="409.535" Num="5" zHalfNm="267.092" Error="1.933">
-268.579 -51.402 19.532 -2.538 0.198
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.24" Depth="0.13"/>
<TopsideChapman PeakHeight="409.535" PeakDensity="1228318.9" PeakScaleHeight="103.928" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
