<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 21:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, 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" >
2026.01.29 (029) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901292140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.466" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.840" 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="0.649" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.675" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.497" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.219" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.072" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.302" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.042" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 310.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.833 316.667 317.500 318.333 319.167 320.000 320.833 321.667 322.500 323.333 324.167 325.000 325.000 325.000 325.000 325.000 328.333 331.667 335.000 335.000 335.000 336.667 338.333 340.000 340.000 341.000 342.000 343.000 344.000 345.000 345.833 346.667 347.500 348.333 349.167 350.000 352.000 354.000 356.000 358.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 367.500 370.000 370.000 367.500 365.000 370.000 371.250 372.500 373.750 375.000 375.000 380.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 406.667 408.333 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 462.500 465.000 470.000 470.000 470.000 470.000 470.000 476.667 483.333 490.000 491.667 493.333 495.000 500.000 505.000 505.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 530.000 532.762 535.840 539.291 543.186 547.619 552.708 558.611 565.539 573.787 583.769 596.098
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 66 66 69 0 0 0 0 0 0 0 63 0 0 0 0 0 0 0 0 0 69 0 69 69 66 0 54 60 66 72 51 0 0 63 48 0 0 0 63 0 69 0 0 0 66 0 0 0 0 54 57 0 0 69 0 0 0 54 57 0 0 66 0 63 0 66 63 60 63 63 0 60 63 54 60 60 60 60 60 63 60 60 54 57 0 0 57 0 0 57 0 0 60 57 57 60 54 60 60 60 63 57 63 57 63 63 63 63 60 51 57 60 51 66 69 66 63 63 63 66 66 63 66 57 63 69 57 51 0 48 48 48 57 54 54 57 0 69 0 54 60 60 57 51 57 57 54
</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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -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 2.734375 -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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -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 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -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" >
90.922 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.795 140.0 145.0 150.0 155.0 160.0 161.591 165.0 170.0 175.0 180.0 185.0 187.386 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.675 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.43 0.562 0.628 0.649 0.64 0.611 0.56 0.48 0.347 0.317 0.317 0.317 0.317 0.317 0.317 0.317 0.361 0.425 0.49 0.554 0.618 0.649 0.722 0.828 0.924 1.021 1.122 1.23 1.348 1.478 1.621 1.78 1.957 2.153 2.367 2.598 2.844 3.102 3.367 3.638 3.912 4.186 4.461 4.735 5.009 5.281 5.551 5.821 6.089 6.356 6.622 6.887 7.151 7.413 7.674 7.933 8.189 8.442 8.689 8.93 9.162 9.382 9.585 9.767 9.921 10.041 10.118 10.15 10.15 10.144 10.123 10.087 10.037 9.975 9.901 9.816 9.721 9.617 9.505 9.386 9.26 9.129 8.992 8.851 8.706 8.557 8.406 8.253 8.099 7.943 7.786 7.628 7.471 7.314 7.157 7.001 6.846 6.692 6.54 6.389 6.24 6.093 5.948 5.805 5.664 5.525 5.389 5.255 5.123 4.994 4.868 4.744 4.622 4.503 4.386 4.272 4.161 4.052 3.945 3.841 3.739 3.64 3.543 3.448 3.356 3.266 3.178 3.092 3.008 2.927 2.847 2.77 2.694 2.621 2.549 2.48 2.412 2.346 2.281 2.219 2.158 2.098 2.04 1.984 1.929 1.876 1.824 1.774 1.725 1.677 1.63 1.585 1.541 1.498 1.457 1.416 1.377 1.339 1.301 1.265 1.23 1.196 1.162 1.13 1.099 1.068 1.038 1.009 0.981 0.954 0.927 0.901 0.876 0.852 0.828 0.805 0.782 0.76 0.739 0.718 0.698 0.679 0.66 0.641 0.624 0.606

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.649" PeakHeight="110.0" Num="3" Error="0.0">
-24.188 5.779 -0.669
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.649" EndFrequency="10.15" PeakHeight="415.675" Num="5" zHalfNm="340.497" Error="5.14">
-218.265 -20.312 14.961 -9.731 5.058
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.386" Depth="0.332"/>
<TopsideChapman PeakHeight="415.675" PeakDensity="1278194.8" PeakScaleHeight="55.042" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
