<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 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 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" >
2026.01.30 (030) 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">
FF202603001302140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.379" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.842" 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="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="0.650" 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="438.299" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="351.354" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.219" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.467" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.240" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.914" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.910" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="151">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.455 320.909 321.364 321.818 322.273 322.727 323.182 323.636 324.091 324.545 325.000 325.000 325.000 325.000 326.429 327.857 329.286 330.714 332.143 333.571 335.000 336.071 337.143 338.214 339.286 340.357 341.429 342.500 343.571 344.643 345.714 346.786 347.857 349.048 350.238 351.429 352.619 353.810 355.000 350.000 353.000 356.000 359.000 362.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.000 367.000 368.000 369.000 370.000 375.000 376.667 378.333 380.000 381.250 382.500 383.750 385.000 385.000 386.667 388.333 390.000 391.667 393.333 395.000 395.000 400.000 401.667 403.333 405.000 406.667 408.333 410.000 411.667 413.333 415.000 415.000 415.000 417.222 419.444 421.667 423.889 426.111 428.333 430.556 432.778 435.000 440.000 441.667 443.333 445.000 445.000 448.000 451.000 454.000 457.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 510.000 515.000 515.000 520.000 525.000 525.000 525.000 535.000 530.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 580.000 585.000 591.264 598.162 605.794 614.286 623.790 634.499 646.658
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 0 63 0 63 63 0 0 66 0 0 0 0 0 0 0 66 66 72 60 0 0 69 0 63 0 72 0 0 0 0 0 0 0 0 0 0 0 60 0 54 0 0 0 69 0 0 63 0 0 57 0 63 0 66 0 63 0 0 0 0 0 0 0 0 66 0 0 0 69 0 0 69 0 0 0 69 0 66 0 0 51 0 0 0 0 0 63 63 0 0 0 0 63 0 0 0 0 63 60 0 0 60 63 0 0 0 0 57 63 57 63 0 51 60 54 63 63 63 63 63 63 60 63 63 60 54 63 63 60 66 51 63 57 63 60 63 63 63 63 63 60 60 57 57 57 60 60 45 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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.919 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.779 140.0 145.0 150.0 155.0 160.0 161.559 165.0 170.0 175.0 180.0 185.0 187.338 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 438.299 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.431 0.563 0.629 0.65 0.641 0.612 0.561 0.48 0.348 0.318 0.318 0.318 0.318 0.318 0.318 0.318 0.362 0.427 0.491 0.555 0.62 0.65 0.707 0.795 0.876 0.957 1.04 1.128 1.223 1.325 1.437 1.56 1.695 1.846 2.011 2.194 2.392 2.605 2.831 3.068 3.311 3.559 3.809 4.061 4.312 4.561 4.81 5.056 5.301 5.544 5.784 6.023 6.259 6.494 6.726 6.955 7.182 7.406 7.627 7.844 8.055 8.261 8.461 8.651 8.832 9.0 9.153 9.289 9.403 9.494 9.558 9.593 9.6 9.599 9.59 9.57 9.54 9.5 9.451 9.394 9.329 9.256 9.177 9.092 9.001 8.905 8.804 8.699 8.59 8.477 8.362 8.244 8.123 8.001 7.877 7.752 7.625 7.498 7.37 7.242 7.114 6.986 6.858 6.73 6.603 6.477 6.352 6.227 6.104 5.982 5.861 5.742 5.624 5.507 5.392 5.278 5.166 5.056 4.947 4.84 4.735 4.632 4.53 4.43 4.332 4.236 4.141 4.048 3.957 3.867 3.78 3.694 3.61 3.527 3.446 3.367 3.289 3.213 3.139 3.066 2.995 2.925 2.857 2.79 2.725 2.661 2.599 2.538 2.478 2.419 2.362 2.307 2.252 2.199 2.147 2.096 2.046 1.997 1.95 1.903 1.858 1.814 1.771 1.728 1.687 1.647 1.607 1.569 1.532 1.495 1.459 1.424 1.39 1.357 1.324 1.292 1.261 1.231 1.202 1.173 1.145 1.117 1.09 1.064 1.038 1.013

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.65" PeakHeight="110.0" Num="3" Error="0.0">
-24.198 5.787 -0.67
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.65" EndFrequency="9.6" PeakHeight="438.299" Num="5" zHalfNm="351.354" Error="6.71">
-243.459 -13.847 10.188 -8.909 5.066
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.338" Depth="0.332"/>
<TopsideChapman PeakHeight="438.299" PeakDensity="1143424.4" PeakScaleHeight="63.914" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
