<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 22:40:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 22:40:00</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">
FF202603001302240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.396" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.204" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="445.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="445.000" 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="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="588.800" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="490.853" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="434.092" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.545" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.824" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.703" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.420" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
450.000 450.000 445.000 445.000 445.000 445.000 455.000 465.000 455.000 460.000 461.000 462.000 463.000 464.000 465.000 466.000 467.000 468.000 469.000 470.000 471.000 472.000 473.000 474.000 475.000 475.000 472.500 470.000 472.500 475.000 480.000 480.000 482.143 484.286 486.429 488.571 490.714 492.857 495.000 500.000 505.000 507.500 510.000 510.000 515.000 515.000 515.000 520.000 520.000 522.500 525.000 520.000 520.000 515.000 515.000 515.000 520.000 520.000 520.000 520.000 520.000 520.000 515.000 515.000 515.000 515.000 516.500 518.000 519.500 521.000 522.500 524.000 525.500 527.000 528.500 530.000 525.000 525.000 525.000 525.000 525.417 525.833 526.250 515.000 517.500 520.000 522.500 525.000 527.500 530.000 540.000 545.000 550.000 555.000 558.750 562.500 566.250 570.000 575.000 575.000 575.000 575.692 576.552 577.649 579.097 581.098 584.042 588.800 597.800 621.268
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 57 0 63 66 57 63 63 60 0 57 57 57 54 0 57 63 0 0 57 60 63 0 60 60 0 60 0 57 57 60 60 60 57 60 60 60 54 57 60 0 63 63 63 57 63 57 69 0 66 63 63 60 60 60 63 57 63 57 57 60 63 63 57 57 60 66 60 57 0 57 0 0 0 57 54 0 0 60 57 0 0 57 54 0 57 60 60 51 60 60 57 54 54 0 63 60 63 66 60 60 0 0 0 0 51 54 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 2.734375 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.171875 -2.734375 -1.171875 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -2.734375 0.390625 -1.171875 -1.953125 1.953125 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 -1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.329 145.0 150.0 155.0 160.0 165.0 170.0 174.657 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.986 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 490.853 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.304 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.225 0.249 0.273 0.297 0.321 0.345 0.354 0.382 0.436 0.5 0.572 0.651 0.735 0.821 0.91 1.001 1.094 1.188 1.283 1.381 1.48 1.58 1.683 1.787 1.894 2.003 2.114 2.227 2.343 2.462 2.583 2.708 2.835 2.966 3.099 3.237 3.378 3.522 3.671 3.824 3.981 4.143 4.31 4.481 4.658 4.841 5.029 5.223 5.424 5.632 5.847 6.07 6.3 6.539 6.785 7.04 7.303 7.571 7.843 8.114 8.373 8.601 8.772 8.848 8.85 8.842 8.812 8.761 8.691 8.604 8.502 8.386 8.258 8.12 7.972 7.817 7.656 7.49 7.319 7.146 6.97 6.792 6.614 6.436 6.259 6.082 5.907 5.734 5.564 5.396 5.23 5.068 4.909 4.753 4.6 4.452 4.306 4.165 4.027 3.893 3.762 3.635 3.512 3.392 3.276 3.164 3.055 2.949 2.847 2.748 2.652 2.559 2.469 2.382 2.299 2.217 2.139 2.063 1.99 1.919 1.851 1.785 1.722 1.66 1.601 1.544 1.488 1.435 1.384 1.334 1.286 1.24 1.196 1.153 1.111 1.071 1.033 0.995 0.96 0.925 0.892 0.86 0.829 0.799 0.77 0.742 0.715 0.69 0.665 0.641 0.618 0.595 0.574 0.553 0.533 0.514 0.495 0.477 0.46 0.444 0.428 0.412 0.397 0.383 0.369 0.356 0.343

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.85" PeakHeight="490.853" Num="5" zHalfNm="434.092" Error="2.909">
-240.492 -77.604 44.267 -9.578 -0.46
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.986" Depth="0.154"/>
<TopsideChapman PeakHeight="490.853" PeakDensity="971743.2" PeakScaleHeight="42.42" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
