<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.02.05 (036) 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">
FF202603602052200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.552" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.334" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.250" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.200" 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="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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="517.129" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.416" 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="424.834" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="361.734" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.600" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="93.485" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.453" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.300" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="100.040" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 355.000 353.333 351.667 350.000 355.000 355.000 355.000 355.000 355.000 360.000 357.500 355.000 355.000 360.000 365.000 362.500 360.000 365.000 365.000 365.000 365.625 366.250 366.875 367.500 368.125 368.750 369.375 370.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 387.500 390.000 391.250 392.500 393.750 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 405.000 406.667 408.333 410.000 410.000 405.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 446.667 448.333 450.000 455.000 455.000 457.500 460.000 462.500 465.000 465.000 465.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 502.506 505.373 508.684 512.552 517.129 522.631 529.370 537.814 548.706 563.289 583.824
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 54 0 0 72 69 63 69 69 72 66 0 72 78 81 69 0 0 81 84 84 0 0 0 0 0 0 0 75 75 78 60 60 66 69 75 75 66 0 0 57 66 0 0 0 54 60 0 0 54 63 0 0 57 0 69 69 0 0 0 72 54 66 69 48 0 75 0 60 72 63 75 66 72 60 78 69 78 66 75 75 75 60 0 66 0 0 69 63 66 0 0 0 60 66 66 0 51 60 63 57 63 69 66 72 66 69 63 66 57 0 48 0 0 51 0 0 0 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 -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 -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 -1.953125 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 -0.390625 -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 -2.734375 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 1.171875 -0.390625 -1.171875 1.171875 2.734375 -2.734375 -1.953125 -1.171875 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 107.500 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 0 57 60 0 60 60 57 0 60 54 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -2.734375 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" >
92.459 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.082 140.0 145.0 150.0 155.0 160.0 165.0 168.165 170.0 175.0 180.0 185.0 190.0 195.0 197.247 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 424.834 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.275 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 0.459 0.537 0.618 0.702 0.792 0.887 0.987 1.094 1.207 1.327 1.454 1.588 1.729 1.877 2.033 2.196 2.366 2.544 2.73 2.923 3.124 3.333 3.55 3.773 4.005 4.243 4.489 4.742 5.001 5.266 5.536 5.811 6.09 6.371 6.652 6.932 7.207 7.475 7.732 7.972 8.191 8.382 8.538 8.655 8.727 8.75 8.75 8.74 8.712 8.668 8.609 8.536 8.45 8.352 8.245 8.128 8.004 7.872 7.735 7.593 7.446 7.295 7.142 6.987 6.831 6.673 6.516 6.358 6.2 6.044 5.888 5.734 5.582 5.432 5.283 5.137 4.994 4.853 4.714 4.579 4.446 4.316 4.189 4.065 3.944 3.826 3.71 3.598 3.488 3.382 3.278 3.177 3.079 2.983 2.89 2.8 2.713 2.628 2.545 2.465 2.387 2.312 2.238 2.167 2.098 2.032 1.967 1.904 1.843 1.784 1.727 1.672 1.618 1.566 1.516 1.467 1.42 1.374 1.33 1.287 1.246 1.206 1.167 1.129 1.092 1.057 1.023 0.99 0.958 0.927 0.897 0.868 0.84 0.813 0.786 0.761 0.736 0.712 0.689 0.667 0.645 0.624 0.604 0.584 0.565 0.547 0.529 0.512 0.496 0.479 0.464 0.449 0.434 0.42 0.407 0.393 0.381 0.368 0.356 0.345 0.333 0.323

</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="8.75" PeakHeight="424.834" Num="5" zHalfNm="361.734" Error="2.04">
-210.763 -29.445 14.527 -2.59 0.684
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.247" Depth="0.216"/>
<TopsideChapman PeakHeight="424.834" PeakDensity="949906.94" PeakScaleHeight="47.3" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
