<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 22:40:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, Unidentified traces above foF2</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" >
2026.02.08 (039) 22:40:00</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">
FF202603902082240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.559" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.603" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="506.084" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="442.112" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="376.641" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.615" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="96.540" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.156" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.658" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 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 8.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 381.389 382.778 384.167 385.556 386.944 388.333 389.722 391.111 392.500 393.889 395.278 396.667 398.056 399.444 400.833 402.222 403.611 405.000 406.667 408.333 410.000 410.000 410.000 410.000 411.667 413.333 415.000 415.000 415.000 410.000 410.000 415.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 427.500 430.000 432.500 435.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 440.000 440.000 435.000 440.000 445.000 446.667 448.333 450.000 455.000 455.000 455.833 456.667 457.500 458.333 459.167 460.000 460.833 461.667 462.500 463.333 464.167 465.000 465.000 470.000 471.826 473.864 476.153 478.743 481.697 485.098 489.056 493.720 499.297 506.084 514.523 525.300 539.544 559.249 588.298 635.405 725.004
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 69 60 69 66 0 69 0 0 0 0 69 0 0 0 0 0 0 0 0 69 0 0 0 0 60 0 0 0 69 54 0 63 66 69 72 0 0 57 63 60 69 72 0 54 66 66 57 0 48 66 69 69 0 69 72 0 60 0 63 63 63 69 0 66 66 72 0 75 69 0 66 0 0 63 60 60 57 0 0 0 0 0 0 69 0 60 0 69 0 63 0 0 57 0 0 0 0 0 0 51 63 51 63 66 0 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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 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 1.953125 -1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 -0.390625 -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 1.171875 0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 105.000 105.000 115.000 105.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 0 0 54 57 57 57
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.384 145.0 150.0 155.0 160.0 165.0 170.0 174.768 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.152 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 442.112 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.225 0.249 0.272 0.296 0.32 0.344 0.354 0.379 0.43 0.492 0.562 0.642 0.728 0.819 0.915 1.016 1.121 1.23 1.344 1.463 1.586 1.715 1.85 1.991 2.138 2.292 2.453 2.621 2.798 2.984 3.178 3.381 3.593 3.815 4.046 4.287 4.536 4.794 5.058 5.328 5.602 5.877 6.15 6.418 6.678 6.926 7.157 7.368 7.556 7.717 7.848 7.948 8.015 8.047 8.05 8.047 8.031 8.0 7.956 7.899 7.832 7.754 7.667 7.571 7.468 7.359 7.243 7.123 6.998 6.87 6.739 6.605 6.47 6.333 6.195 6.057 5.919 5.781 5.643 5.506 5.37 5.236 5.103 4.971 4.842 4.714 4.588 4.465 4.344 4.225 4.108 3.994 3.882 3.772 3.665 3.561 3.459 3.359 3.262 3.167 3.075 2.984 2.897 2.811 2.728 2.647 2.568 2.492 2.417 2.345 2.275 2.206 2.14 2.075 2.012 1.951 1.892 1.835 1.779 1.725 1.672 1.621 1.572 1.524 1.477 1.432 1.388 1.346 1.304 1.264 1.225 1.188 1.151 1.116 1.082 1.048 1.016 0.985 0.954 0.925 0.896 0.869 0.842 0.816 0.791 0.766 0.743 0.72 0.698 0.676 0.655 0.635 0.615 0.596 0.578 0.56 0.543 0.526 0.51 0.494 0.479 0.464 0.449 0.435 0.422 0.409 0.396

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.05" PeakHeight="442.112" Num="5" zHalfNm="376.641" Error="4.604">
-219.48 -23.911 9.247 1.183 -1.999
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.152" Depth="0.154"/>
<TopsideChapman PeakHeight="442.112" PeakDensity="804001.25" PeakScaleHeight="49.658" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
