<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 22:00:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2o cusp</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) 22:00:00</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">
FF202603702062200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.565" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.321" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.881" 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="0.416" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="431.643" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="380.404" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.960" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.794" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.458" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="172">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 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 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.714 356.429 357.143 357.857 358.571 359.286 360.000 361.000 362.000 363.000 364.000 365.000 365.000 365.000 367.500 370.000 370.714 371.429 372.143 372.857 373.571 374.286 375.000 370.000 371.429 372.857 374.286 375.714 377.143 378.571 380.000 380.000 380.000 381.111 382.222 383.333 384.444 385.556 386.667 387.778 388.889 390.000 390.000 390.000 390.000 390.000 391.667 393.333 395.000 395.714 396.429 397.143 397.857 398.571 399.286 400.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 410.000 405.000 405.000 410.000 412.500 415.000 415.000 415.000 415.000 415.000 415.000 416.000 417.000 418.000 419.000 420.000 421.000 422.000 423.000 424.000 425.000 425.000 425.000 425.000 430.000 431.667 433.333 435.000 435.000 435.000 435.000 435.000 435.000 435.000 435.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 440.000 442.500 445.000 447.500 450.000 450.000 450.000 450.000 452.500 455.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 465.000 465.000 470.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 477.500 480.000 480.000 480.000 480.000 480.000 485.000 487.500 490.000 492.500 495.000 497.500 500.000 502.500 505.000 507.500 510.000 512.500 515.000 515.000 517.718 520.881 524.606 529.058 534.473 541.202 549.789
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 63 0 0 0 0 0 0 63 60 63 60 0 0 0 0 0 0 63 0 0 0 0 66 0 66 54 54 0 0 0 0 0 0 51 54 0 0 0 0 57 0 57 0 57 0 0 0 0 0 0 0 0 69 66 0 0 69 0 0 69 0 0 54 0 0 0 66 72 0 0 0 0 54 57 66 63 66 72 0 60 0 0 48 0 0 0 0 0 0 51 0 0 0 0 69 0 69 72 63 0 48 57 0 63 0 0 72 72 69 72 72 0 72 66 69 72 69 0 72 69 75 69 0 72 0 63 48 0 60 69 75 60 0 45 66 78 69 60 69 69 69 72 0 69 60 63 72 72 0 0 66 0 66 66 63 60 57 48 63 0 51 0 60 60 57 48 48 54 54 51 0
</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="183">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.459 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.09 140.0 145.0 150.0 155.0 160.0 165.0 168.181 170.0 175.0 180.0 185.0 190.0 195.0 197.271 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 431.643 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.275 0.36 0.403 0.416 0.411 0.397 0.371 0.332 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.251 0.288 0.325 0.362 0.399 0.416 0.466 0.545 0.62 0.694 0.77 0.849 0.933 1.02 1.113 1.211 1.315 1.426 1.545 1.67 1.804 1.947 2.098 2.259 2.429 2.61 2.802 3.004 3.218 3.443 3.681 3.93 4.192 4.466 4.753 5.053 5.366 5.692 6.03 6.381 6.743 7.116 7.499 7.89 8.286 8.682 9.074 9.452 9.806 10.121 10.378 10.559 10.644 10.65 10.642 10.603 10.534 10.437 10.316 10.173 10.012 9.834 9.642 9.438 9.225 9.004 8.777 8.546 8.312 8.076 7.84 7.604 7.369 7.137 6.907 6.68 6.457 6.239 6.025 5.815 5.611 5.412 5.217 5.029 4.846 4.668 4.495 4.328 4.166 4.01 3.858 3.712 3.571 3.434 3.303 3.176 3.053 2.935 2.822 2.712 2.607 2.505 2.407 2.313 2.223 2.136 2.052 1.971 1.894 1.819 1.747 1.678 1.612 1.548 1.487 1.428 1.372 1.318 1.265 1.215 1.167 1.121 1.076 1.034 0.993 0.953 0.915 0.879 0.844 0.811 0.778 0.747 0.718 0.689 0.662 0.636 0.61 0.586 0.563 0.54 0.519 0.498 0.478 0.459 0.441 0.423 0.407 0.39 0.375 0.36 0.346 0.332 0.319 0.306 0.294 0.282 0.271 0.26 0.25 0.24 0.23 0.221 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.416" PeakHeight="110.0" Num="3" Error="0.0">
-20.622 3.328 -0.247
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.416" EndFrequency="10.65" PeakHeight="431.643" Num="5" zHalfNm="380.404" Error="3.921">
-199.244 -51.688 16.48 -1.497 1.577
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.271" Depth="0.216"/>
<TopsideChapman PeakHeight="431.643" PeakDensity="1407227.0" PeakScaleHeight="38.458" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
