<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 21:20:00.000"
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) 21:20:00</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">
FF202603302022120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.271" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.684" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="1.019" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="449.111" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.704" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.138" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="165.082" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.481" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.684" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="167.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.890" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 300.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 311.810 313.621 315.431 317.241 319.052 320.862 322.672 324.483 326.293 328.103 329.914 331.724 333.534 335.345 337.155 338.966 340.776 342.586 344.397 346.207 348.017 349.828 351.638 353.448 355.259 357.069 358.879 360.690 362.500 364.310 366.121 367.931 369.741 371.552 373.362 375.172 376.983 378.793 380.603 382.414 384.224 386.034 387.845 389.655 391.466 393.276 395.086 396.897 398.707 400.517 402.328 404.138 405.948 407.759 409.569 411.379 413.190 415.000 420.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 455.000 459.167 463.333 467.500 471.667 475.833 480.000 480.000 480.000 485.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 540.000 540.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 585.000 590.000 595.000 600.000 605.895 612.407 619.639 627.716 636.797 647.081 658.824 672.359 688.132 706.746 729.047
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 57 0 0 66 66 0 0 0 57 63 0 0 66 66 66 60 69 69 66 66 60 54 48 0 0 0 0 0 0 0 0 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 0 66 0 0 0 0 0 0 0 63 0 69 75 78 72 78 72 54 66 60 57 66 60 66 63 0 63 0 66 0 60 66 66 66 72 72 60 66 69 66 60 72 66 69 78 75 72 72 66 66 69 66 63 63 66 66 60 63 63 63 63 60 57 60 51 57 51 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -2.734375 -1.171875 -1.171875 1.171875 -1.171875 2.734375 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -2.734375 -1.171875 -1.171875 1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 -1.171875 2.734375 1.953125 -1.953125
</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" >
90.252 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.557 130.0 135.0 140.0 143.114 145.0 150.0 155.0 159.671 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 449.111 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.678 0.883 0.986 1.019 1.002 0.949 0.854 0.814 0.814 0.814 0.814 0.814 0.837 0.899 0.961 1.019 1.025 1.116 1.201 1.286 1.374 1.465 1.563 1.667 1.78 1.904 2.039 2.188 2.351 2.528 2.718 2.92 3.131 3.346 3.563 3.78 3.995 4.206 4.413 4.617 4.816 5.011 5.203 5.391 5.575 5.757 5.936 6.113 6.287 6.459 6.628 6.796 6.962 7.126 7.289 7.449 7.608 7.764 7.918 8.07 8.22 8.366 8.509 8.647 8.781 8.908 9.029 9.141 9.244 9.334 9.411 9.473 9.517 9.543 9.55 9.55 9.545 9.535 9.518 9.495 9.467 9.433 9.394 9.35 9.302 9.25 9.193 9.133 9.069 9.001 8.931 8.857 8.781 8.702 8.621 8.537 8.452 8.365 8.276 8.186 8.094 8.002 7.908 7.813 7.718 7.622 7.526 7.429 7.332 7.234 7.137 7.04 6.942 6.845 6.748 6.651 6.555 6.459 6.364 6.269 6.175 6.081 5.988 5.896 5.804 5.714 5.624 5.535 5.447 5.359 5.273 5.188 5.103 5.02 4.937 4.855 4.775 4.695 4.617 4.539 4.463 4.387 4.313 4.239 4.167 4.095 4.025 3.956 3.887 3.82 3.753 3.688 3.624 3.56 3.498 3.437 3.376 3.317 3.258 3.2 3.144 3.088 3.033 2.979 2.926 2.874 2.822 2.772 2.722 2.673 2.625 2.578 2.532 2.486 2.441 2.397 2.354 2.311 2.269 2.228 2.188 2.148 2.109 2.071 2.033 1.996

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.019" PeakHeight="110.0" Num="3" Error="0.0">
-26.588 8.087 -1.247
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.019" EndFrequency="9.55" PeakHeight="449.111" Num="5" zHalfNm="333.704" Error="6.156">
-284.339 -13.336 17.596 -15.196 5.835
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="49.671" Depth="0.205"/>
<TopsideChapman PeakHeight="449.111" PeakDensity="1131544.6" PeakScaleHeight="83.684" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
